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standing in front of a display of some of the historic television tubes he invented. Working at
Westinghouse and RCA laboratories from 1923 through the 1940s, Zworykin invented the first successful electronic-scan television systems, including the widely used iconoscope camera
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311:), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
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magazine would have the copyright renewed in 1982. Online page scans of the
Catalog of Copyright Entries, published by the US Copyright Office can be found here.
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because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the
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This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
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If the file has been modified from its original state, some details may not fully reflect the modified file.
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Search of the
Renewals for Periodicals for all years from 1978 to the present show no renewal entries for
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magazine, Radio
Corporation of America, New York, Vol. 13, No. 4, October 1954, p. 27. Retrieved from a
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The following pages on the
English Knowledge use this file (pages on other projects are not listed):
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for US works (depending on the date of the author's death), such as Canada (70 years
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Note that it may still be copyrighted in jurisdictions that do not apply the
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Dr. Vladimir K. Zworykin, with historic TV tubes he has helped to develop.
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Click on a date/time to view the file as it appeared at that time.
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Better quality version from same digital capture, from archive.org
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this direct link to the high-resolution scan of the page
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Commons is a freely licensed media file repository.
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774:Հաղորդիչ հեռուստատեսային խողովակ
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175:October 1954
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119:You can help
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
