File:Vladimir Zworykin and historic TV tubes.jpg
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Summary
| Description |
English: Russian-American electrical engineer and inventor Vladimir K. Zworykin 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 tube. Caption: "Dr. Vladimir K. Zworykin, with historic TV tubes he has helped to develop." |
| Date | |
| Source | Radio Age magazine, Radio Corporation of America, New York, Vol. 13, No. 4, October 1954, p. 27. Retrieved from a scan of Radio Age Vols. 12-13 (1953-54) at the Internet Archive, specifically this direct link to the high-resolution scan of the page, and cropped to show just the photo. |
| Author | Unknown author |
| Permission (Reusing this file) |
This 1954 issue of Radio Age 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. [1] Search of the Renewals for Periodicals for all years from 1978 to the present show no renewal entries for Radio Age. Therefore the magazine's copyright was not renewed and it is in the public domain. |
Licensing
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This work is in the public domain 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 copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), 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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File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:37, 25 August 2021 | | 1,776 × 1,076 (694 KB) | Micler | Better quality version from same digital capture, from archive.org |
| 14:37, 12 May 2014 |  | 948 × 576 (87 KB) | Chetvorno | User created page with UploadWizard |
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