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Description
English: Drawings from IBM floppy disk drive patents
Date 1969, 1970
Source

U.S. Patent 3,668,658, Fig. 2,

U.S. Patent 3,678,481, Fig. 1.
Author Ralph Flores, Herbert E. Thompson, Warren L. Dalziel, Jay B. Nilson, Donald L. Wartner
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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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current00:23, 10 February 2015Thumbnail for version as of 00:23, 10 February 20152,900 × 2,610 (80 KB)Mikhail Ryazanov (talk | contribs){{Information |Description= {{en|Drawings from IBM Floppy Disk Drive Patents}} |Source= [http://www.google.com/patents/US3668658 Magnetic record disk cover US 3668658 A], Fig. 2,<br/> [http://www.google.com/patents/US3678481 Data storage apparatus empl...

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