587:
would embed a text string within DWG files written by the program: "Autodesk DWG. This file is a
Trusted DWG last saved by an Autodesk application or Autodesk licensed application." This helped Autodesk software users ensure that the files they were opening were created by an Autodesk, or RealDWG application, reducing risk of incompatibilities. AutoCAD would pop up a message, warning of potential stability problems, if a user opened a 2007 version DWG file which did not include this text string.
659:
DWGdirect libraries. The effect of the temporary restraining order and subsequent consent decree was to render the Open Design
Alliance's DWGdirect libraries, from one point of view, incapable of creating DWG files that are 100% compatible with AutoCAD Unsubstantiated claim. Others point out that the failure of "100% compatibility" means only that loading such a drawing triggers an essentially irrelevant warning message when the file is opened in AutoCAD.
45:
149:
703:
products amounted to trademark infringement. In
January 2010, on the morning that trial was scheduled to begin, Autodesk and SolidWorks settled the suit, with SolidWorks acknowledging Autodesk's trademark rights for DWG, surrendering its trademark registrations for its DWG related projects, and withdrawing its opposition to Autodesk's DWG-related trademark registrations.
691:. Autodesk subsequently filed a petition for cancellation of SolidWorks' trademark registration for DWGEDITOR. In both cases, Autodesk's basis was that they had "been using the DWG name with its CAD software products since at least as early as 1983." The opposition and cancellation actions were consolidated, and suspended pending disposition of Autodesk's
707:
agreements between the parties are not binding upon the USPTO. In March 2010, the Office of the Deputy
Commissioner for Trademark Examination Policy at the USPTO determined that evidence submitted by the Open Design Alliance two years earlier was relevant and supported a reasonable ground for refusal to register DWG as a trademark.
671:. The REALDWG and DWGX registrations were opposed by SolidWorks. The DWG EXTREME, DWG TRUECONVERT, and DWG TRUEVIEW trademark registration applications all received substantial resistance, with the USPTO examining attorney requiring Autodesk to disclaim exclusive use of DWG as a condition for their registration.
702:
In 2008, Autodesk sued SolidWorks in US District Court, arguing that through its marketing efforts, the term "DWG" has lost its original generic meaning and taken on a secondary meaning referring specifically to
Autodesk's proprietary drawing file format, and therefore any use of "DWG" in competitive
824:
Autodesk DWG TrueView is a freeware, closed source, stand-alone DWG viewer with DWG TrueConvert software included, built on the same viewing engine as AutoCAD software. The freeware
Autodesk Design Review software adds a possibility to open DWG files in Design Review to take advantage of measure and
718:
DWG is merely descriptive of applicant's goods under
Section 2(e)(1) of the Trademark Act for two reasons: (1) DWG is a recognized abbreviation for "drawing," and (2) .dwg is a file format used for computer-aided design (CAD) drawings made both with applicant's CAD software and others' CAD software.
586:
to AutoCAD R14.01, through a function called DWGCHECK. This function was supported by an encrypted checksum and product code (called a "watermark" by
Autodesk), written into DWG files created by the program. In 2006 Autodesk modified AutoCAD 2007, to include "TrustedDWG technology", a function which
706:
In April 2010, Autodesk and the Open Design
Alliance settled their suit, with the Open Design Alliance agreeing to cancel its DWG-based trademark registrations and cease use of DWG and DWG-based trademarks in its product marketing and branding. Because there was no adjudication in either case, the
636:
agreed on exchange of software libraries, including
Autodesk RealDWG, to improve the ability to read and write the companies' respective DWG and DGN formats in mixed environments with greater fidelity. In addition, the two companies will facilitate work process interoperability between their AEC
674:
In a non-final action in May 2007, the USPTO examining attorney refused to register the two DWG marks, as they are "merely descriptive" of the use of DWG as a file format name. In September 2007, Autodesk responded, claiming that DWG has gained a "secondary meaning," separate from its use as a
566:
There are several claims to control of the DWG format. As the biggest and most influential creator of DWG files it is Autodesk who designs, defines, and iterates the DWG format as the native format for their CAD applications. Autodesk sells a read/write library, called RealDWG, under selective
658:
against the Open Design Alliance. In April 2007, the suit was settled, essentially on Autodesk's terms, with Autodesk modifying the warning message in AutoCAD 2008 (to make it somewhat less alarming), and the Open Design Alliance removing support for writing the TrustedDWG watermark from its
683:
Corporation. The USPTO office actions notifying Autodesk of this noted that Autodesk was not the exclusive source of files with the format name DWG, and Autodesk does not control the use of DWG by others, either as a trademark or as a file format name, among other points.
666:
on "DWG", "DWG EXTREME", "DWG TRUECONVERT", "REALDWG", "DWGX", "DWG TRUEVIEW". As early as 1996, Autodesk has disclaimed exclusive use of the DWG mark in US trademark filings. Out of these applications, only TRUSTEDDWG has been registered as a trademark by the
678:
As of June 22, 2008, all of Autodesk's DWG-related trademark registration proceedings were suspended by the USPTO, pending disposition of trademark opposition and cancellation petitions Autodesk had filed against the Open Design Alliance and Dassault Systèmes
698:
In early 2007, Autodesk petitioned the USPTO to cancel the Open Design Alliance's "OpenDWG" trademarks, claiming that they had been abandoned. This cancellation action was suspended pending disposition of Autodesk's US District Court suit against SolidWorks.
653:
alleging that its DWGdirect libraries infringed Autodesk's trademark for the word "Autodesk", by writing the TrustedDWG watermark (including the word "AutoCAD") into DWG files it created. Nine days later, Autodesk's attorneys won a broad and deep
291:
compliant applications. In addition, DWG is supported non-natively by many other CAD applications. The .bak (drawing backup), .dws (drawing standards), .dwt (drawing template) and .sv$ (temporary automatic save) files are also DWG files.
761:
asserted the need for an open replacement for the DWG format. Therefore, the FSF placed the goal 'Replacement for OpenDWG libraries' in 10th place on their High Priority Free Software Projects list. Forked in late 2009 from libDWG,
1262:
Autodesk originally used the term "Trusted DWG", with an embedded space. They modified it removing the space, prior to filing a US trademark application in September 2006,
793:. A GPLv2 licensed alternative is the libdxfrw project, which can read simple DWGs. Some of these CAD licenses were only fixed recently to be able to use LibreDWG's GPLv3.
1048:
563:
The DWG format is probably the most widely used format for CAD drawings. Autodesk estimates that in 1998 there were in excess of two billion DWG files in existence.
1681:
560:. From 1982 to 2009, Autodesk created versions of AutoCAD which wrote no fewer than 18 major variants of the DWG file format, none of which is publicly documented.
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1933:
1902:
1531:
1303:
964:
614:. Therefore, the FSF placed the goal 'Replacement for OpenDWG libraries' in 10th place on their High Priority Free Software Projects list. Created in late 2009,
1253:
This "TrustedDWG code" is encoded into DWG files in a fashion that is not humanly readable. This may be validated by using a binary editor to search a DWG file.
575:, a non-profit consortium created in 1998 by a number of software developers (including competitors to Autodesk), released a read/write/view library called the
730:
In late 2014 Autodesk again lost, this time at the United States District Court for the Eastern District of Virginia. The judge dismissed all their arguments.
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66:
59:
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affirmed in 2013 their refusal to recognise DWG as a trademark. Despite this, Autodesk websites still claimed DWG as a trademark after the decision.
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545:
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is a software development platform used to create engineering applications including CAD with native support of .dwg and .dgn files.
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application that can work with the DWG files by using the proprietary ODA File Converter for .dwg and .dxf files from the
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Autodesk's DWG format, and offer software libraries to read and write Autodesk DWG files. The most successful is
81:
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Toolkit, which was based on the MarComp AUTODIRECT libraries. (ODA has since rewritten and updated that code.)
529:
AutoCAD 2018, AutoCAD 2019, AutoCAD 2020, AutoCAD 2021, AutoCAD 2022, AutoCAD 2023, AutoCAD 2024, AutoCAD 2025
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issued a final refusal to register DWG as a trademark owned by Autodesk. They were quoted as saying:
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In 2006, Autodesk filed an opposition with the USPTO to the trademark registration of DWGGATEWAY by
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licensing terms for use in non-competitive applications. Several companies have attempted to
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can read all DWG files from version R13 on. But the LibreDWG library, offered under the
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1082:"DigiBarn Stories: Mike Riddle & the Story of AutoCAD, EasyCAD, FastCAD & more"
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license. It can read DWG files from version R13 up to 2021, and write R2000 DWG files.
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asserted the need for an open replacement for the DWG format, as neither RealDWG nor
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As neither RealDWG nor DWGdirect are licensed on terms that are compatible with
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in which they try to make a distinction between .dwg as a file format and the
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1738:"Summary of Final Decisions Issued by the Trademark Trial and Appeal Board"
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2D CAD application that can open DWG and DXF files using its own library.
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files, ODA Drawings Explorer, which runs on Windows, Linux, and Mac OS X.
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2016:
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922: – Nonprofit organization creating SDKs for engineering applications
913: – Nonprofit organization creating SDKs for engineering applications
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807:(ODA). The ODA also provides a freeware stand-alone viewer for .dwg and
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package, developed by Mike Riddle in the late 1970s, and subsequently
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AutoCAD 2013, AutoCAD 2014, AutoCAD 2015, AutoCAD 2016, AutoCAD 2017
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1155:
DWG: The Registration Attempts & Successes from WorldCAD Access
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markup capabilities, sheet set organization, and status tracking.
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Official Gazette of the United States Patent and Trademark Office
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applications through supporting the reciprocal use of available
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1304:"Autodesk and Bentley to Advance AEC Software Interoperability"
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used for storing two- and three- dimensional design data and
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Complete text of Autodesk's press release - WorldCAD Access
2042:
1226:
Between the Lines: How to identify some problem DWG files
915:
Pages displaying short descriptions of redirect targets
1894:
837: – A widely used CAD 3D data exchange file format
1620:"Docket -> 3:08-cv-04397 (Autodesk v. SolidWorks)"
1273:
1271:
1708:
1143:
With over two billion AutoCAD DWG files worldwide...
861: – Constructing a product by means of computer
1268:
1852:"FSF Wastes Away Another "High Priority" Project"
1166:
1164:
1162:
1019:"Mike Riddle's Prehistoric AutoCAD - Retro Thing"
849: – CAD software interoperability file format
662:In 2006, Autodesk applied for registration of US
2964:
1934:"LibreDWG drama: the end or the new beginning?"
1903:"What's up with DWG adoption in free software?"
1393:"Autodesk v. ODA See line 50, Consent Judgment"
1287:
1285:
965:"What's up with DWG adoption in free software?"
901: – Software library for handling DWG files
773:, could initially not be used by most targeted
733:In 2015 Autodesk's website has a section title
1159:
843: – Method of CAD drawing file translation
2164:
2064:
1925:
1869:
1282:
907: – Free and open-source 2D CAD software
883: – Free and open-source 3D CAD software
1932:Prokoudine, Alexandre (December 27, 2012).
1682:United States Patent & Trademark Office
1532:United States Patent & Trademark Office
895: – CAD editor and development platform
870:Comparison of CAD, CAM and CAE file viewers
2171:
2157:
2071:
2057:
1989:"FreeCAD and DWG Import on freecadweb.org"
1931:
1901:Prokoudine, Alexandre (January 26, 2012).
1900:
1132:
474:AutoCAD 2000, AutoCAD 2000i, AutoCAD 2002
30:"DWG" redirects here. For other uses, see
1843:
1657:"ODA Members | Open Design Alliance"
1356:"Autodesk v. ODA See line 35, Transcript"
745:DWG support in freemium and free software
507:AutoCAD 2010, AutoCAD 2011, AutoCAD 2012
496:AutoCAD 2007, AutoCAD 2008, AutoCAD 2009
485:AutoCAD 2004, AutoCAD 2005, AutoCAD 2006
129:Learn how and when to remove this message
649:On November 13, 2006, Autodesk sued the
625:library released under the terms of the
1849:
1278:FSF promotes need for open DWG packages
441:AutoCAD Release 11, AutoCAD Release 12
267:. It is the native format for several
14:
2965:
1768:"Service & Support : Viewers"
1171:Autodesk - Developer Network - RealDWG
1051:from the original on December 27, 2008
967:. Libre Graphics World. Archived from
889: – Computer aided design software
855: – Computer-aided design software
65:Please improve this article by adding
2152:
2052:
1850:Larabel, Michael (January 24, 2013).
1792:
1714:
1556:from the original on February 8, 2017
644:
544:) was the native file format for the
2078:
2035:of the .dwg file format provided by
723:Autodesk appealed the decision. The
38:
24:
1510:DWG TrueConverter USA.autodesk.com
1425:from the original on June 11, 2008
1025:from the original on June 29, 2009
994:"Guides to Good Practice: Cad_3-2"
639:Application Programming Interfaces
295:
25:
3004:
2138:Comparison of CAD editors for AEC
2019:is a work in progress developing
2010:
1877:"Is GPLv3 compatible with GPLv2?"
1190:from the original on May 28, 2007
1088:from the original on May 25, 2009
2178:
2045:Example .dwg architecture files.
147:
43:
2023:libraries to support DWG files.
1981:
1956:
1817:
1786:
1770:. Autodesk, Inc. Archived from
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271:packages including DraftSight,
1306:. July 8, 2008. Archived from
1181:Originally, OpenDWG Alliance.
1126:
1100:
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1063:
1037:
1011:
957:
932:
13:
1:
2411:Creo Elements/Direct Drafting
1381:AutoCAD Unsubstantiated claim
926:
67:secondary or tertiary sources
7:
1070:The Autodesk File: Footnote
877: – Type of file format
828:
789:, because of a GPLv2/GPLv3
656:temporary restraining order
211:; 42 years ago
10:
3009:
1795:"upFront.eZine Issue #836"
1213:December 27, 2008, at the
865:Comparison of CAD software
777:graphic software, such as
739:DWG technology environment
675:generic file format name.
632:Also in 2008 Autodesk and
535:
29:
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2922:
2854:
2753:
2556:
2338:
2329:
2257:
2196:
2187:
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695:suit against SolidWorks.
556:in 1982 as the basis for
540:DWG (denoted by the .dwg
233:
223:
205:
190:
178:
155:
146:
1881:Free Software Foundation
998:Archaeology Data Service
759:Free Software Foundation
592:Free Software Foundation
582:In 1998, Autodesk added
180:Internet media type
2954:History of CAD software
2874:Open Cascade Technology
2224:Open Cascade Technology
1241:April 17, 2007, at the
791:license incompatibility
2421:DesignSpark Mechanical
1748:: 47. November 5, 2013
1184:"Open Design Alliance"
751:free software licenses
721:
54:relies excessively on
2983:Computer file formats
2711:SolidWorks Electrical
2133:List of CAx companies
1626:on September 23, 2009
1141:on January 19, 1998.
716:
608:free software license
408:AutoCAD Release 2.60
397:AutoCAD Release 2.50
386:AutoCAD Release 2.22
375:AutoCAD Release 2.21
364:AutoCAD Release 2.10
353:AutoCAD Release 2.05
342:AutoCAD Release 1.40
228:Computer-aided design
2189:Free and open-source
2037:Open Design Alliance
1938:Libre Graphics World
1907:Libre Graphics World
1805:on November 29, 2014
1694:"Latest Status Info"
1419:"Latest Status Info"
1310:on February 27, 2009
920:Open Design Alliance
819:free and open-source
805:Open Design Alliance
801:free and open-source
651:Open Design Alliance
573:Open Design Alliance
331:AutoCAD Release 1.2
320:AutoCAD Release 1.0
289:Open Design Alliance
283:(and its variants),
242:Open but Proprietary
199:Open Design Alliance
32:DWG (disambiguation)
2988:Filename extensions
1995:. November 11, 2014
1913:on November 9, 2016
1774:on January 31, 2014
1399:on October 26, 2008
1362:on October 26, 2008
1336:on October 26, 2008
1045:"Existing products"
971:on November 9, 2016
463:AutoCAD Release 14
452:AutoCAD Release 13
430:AutoCAD Release 10
143:
2576:AutoCAD Electrical
1793:Grabowski, Ralph.
1715:Grabowski, Ralph.
1663:on August 23, 2011
1521:Latest Status Info
1499:Latest Status Info
1488:Latest Status Info
1477:Latest Status Info
1466:Latest Status Info
1455:Latest Status Info
1444:Latest Status Info
645:Autodesk trademark
602:on terms that are
542:filename extension
419:AutoCAD Release 9
157:Filename extension
141:
27:File format family
2993:Open file formats
2960:
2959:
2749:
2748:
2416:Creo Elements/Pro
2371:Autodesk Inventor
2325:
2324:
2146:
2145:
1717:"WorldCAD Access"
1608:Ttabvue.uspto.gov
1597:Ttabvue.uspto.gov
1586:Ttabvue.uspto.gov
1575:Ttabvue.uspto.gov
1330:"Autodesk v. ODA"
1114:on March 23, 2010
875:Design Web Format
841:CAD data exchange
710:In June 2011 the
693:US District Court
584:file verification
533:
532:
309:AutoCAD versions
306:Internal version
246:
245:
191:Developed by
139:
138:
131:
113:
16:(Redirected from
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2978:CAD file formats
2856:Modeling kernels
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1944:on March 6, 2016
1940:. Archived from
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1799:upfrontezine.com
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52:This article
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19:
2899:ShapeManager
2800:
2754:File formats
2621:Delta Design
2596:CircuitMaker
2586:BoardStation
2471:MicroStation
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2090:File formats
1997:. Retrieved
1992:
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1971:. Retrieved
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1942:the original
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1911:the original
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1859:. Retrieved
1855:
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1833:. Retrieved
1829:Autodesk.com
1828:
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1809:November 16,
1807:. Retrieved
1803:the original
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1772:the original
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1360:the original
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1334:the original
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1308:the original
1298:
1292:GNU LibreDWG
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1192:. Retrieved
1177:
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1139:the original
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1090:. Retrieved
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1039:
1027:. Retrieved
1013:
1001:. Retrieved
973:. Retrieved
969:the original
959:
947:. Retrieved
944:www.iana.org
943:
934:
835:ISO 10303-21
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2491:Pro/DESKTOP
2331:Proprietary
1993:FreeCAD Web
1968:Sourceforge
1835:February 3,
1825:"About DWG"
1778:January 31,
1752:January 31,
1403:October 16,
1366:October 16,
1340:October 16,
847:AutoCAD DXF
435:DWG R11/12
261:file format
257:proprietary
236:Open format
169:(standards)
2967:Categories
2909:IntelliCAD
2558:Electrical
2533:T-FLEX CAD
2528:SpaceClaim
2523:SolidWorks
2518:Solid Edge
2461:KeyCreator
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2249:SolveSpace
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1973:August 31,
1948:August 31,
1917:August 31,
1886:August 31,
1861:August 31,
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927:References
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689:SolidWorks
681:SolidWorks
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604:compatible
402:DWG R2.60
391:DWG R2.50
380:DWG R2.22
369:DWG R2.21
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2538:Tinkercad
2239:rattleCAD
1667:April 15,
1118:March 30,
1003:April 15,
975:April 15,
771:GNU GPLv3
753:like the
735:About DWG
627:GNU GPLv3
610:like the
596:DWGdirect
523:DWG 2018
512:DWG 2013
501:DWG 2010
490:DWG 2007
479:DWG 2004
468:DWG 2000
325:DWG R1.2
314:DWG R1.0
2973:Autodesk
2736:Upverter
2706:Pulsonix
2671:Multisim
2646:Easytrax
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2451:GstarCAD
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2267:Electric
2229:OpenSCAD
2219:LibreCAD
2214:HeeksCAD
2182:software
2128:AutoLISP
2080:Autodesk
2017:LibreDWG
1856:Phoronix
1551:Archived
1423:Archived
1239:Archived
1211:Archived
1194:June 21,
1188:Archived
1092:June 11,
1086:Archived
1055:June 11,
1049:Archived
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1023:Archived
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887:GstarCAD
853:BricsCAD
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815:LibreCAD
783:LibreCAD
767:LibreDWG
641:(APIs).
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600:licensed
554:Autodesk
550:licensed
457:DWG R14
446:DWG R13
424:DWG R10
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2821:OpenDWG
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2001:2019
1975:2019
1950:2019
1919:2019
1888:2019
1863:2019
1837:2015
1811:2014
1780:2014
1754:2014
1746:1396
1724:2011
1702:2011
1669:2010
1632:2009
1562:2009
1431:2009
1405:2008
1368:2008
1342:2008
1316:2009
1196:2007
1120:2010
1094:2009
1057:2009
1031:2009
1005:2015
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951:2022
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785:and
775:FOSS
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287:and
216:1982
209:1982
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2869:C3D
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2112:DWG
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2097:DXF
859:CAD
764:GNU
616:GNU
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142:DWG
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18:DWG
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2476:NX
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1966:.
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