Petran-Patent-Figure2-cutout.png

Description
English: Part of Page 2 from US Patent 3517980 filed in 1967, granted 1970-06-30. Red bar added to indicate the Nipkow-Disk.
Deutsch: Teil der Seite 2 aus dem US Patent 3517980 beantragt 1967, zugeteilt 1970-06-30. Roter Balken nachträglich eingezeichnet um die Nipkow-Scheibe zu markieren. 1: Nipkow-Scheibe. 2, 5: Umkehrsystem. 3, 10, 11, 12, 19, 20, 21: Spiegel. 4: Objektiv. 6: Schärfeebene. 13: Okular. 14: Achse der Nipkow-Scheibe. 16: Gehäuse. 17: Elektrischer Motor für die Scheibe. 18: Transmissionssystem.
Date
Source US-Patent 3517980 at Google Patents [1]
Author Mojmír Petráň, Milan Hadravsky
Permission
( Reusing this file )
Public domain The text and illustrations of US patents published before March 1, 1989 are in the public domain unless the patent text contains a specific notice that portions are copyrighted. See 37 CFR 1.71(d) , 37 CFR 1.84(s)

The original patent contains no such notice, so its contents are in the public domain. Note: This only applies to images published before March 1, 1989. Patents published after that date are most likely copyrighted, unless in the public domain for another reason, such as {{PD-ineligible}} .

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