File:Farnsworth image dissector tube.jpg
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Summary
| Description |
English: One of the first experimental video camera tubes, called an image dissector, designed by American engineer Philo T. Farnsworth in 1930. |
| Date | |
| Source | Retrieved March 19, 2014 from Philo T. Farnsworth, "Scanning with an electric pencil" in Television News magazine, Popular Book Corp., New York, Vol. 1, No. 1, March-April 1931, p. 51, fig. A on [1] website |
| Author | Philo T. Farnsworth |
| Permission (Reusing this file) |
This 1931 issue of Television News magazine would have the copyright renewed in 1959. Online page scans of the Catalog of Copyright Entries, published by the US Copyright Office can be found here. [2] Search of the Renewals for Periodicals for 1958, 1959 and 1960 show no renewal entries for Radio World. 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.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:55, 10 April 2014 | | 839 × 486 (56 KB) | wikimediacommons>Chetvorno | User created page with UploadWizard |
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