File:Wade-Dahl-Till valve (from patent application).png
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Wade-Dahl-Till_valve_(from_patent_application).png (330 × 500 pixels, file size: 34 KB, MIME type: image/png)
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Summary
| Description |
English: Wade-Dahl-Till valve illustration, from its patent application. It is not clear than any actual such valves still exist to be photographed, so this illustration may be the only such available. |
| Date | |
| Source | US Patent 3233610 (Espacenet) |
| Author | Richard A. Gaudet, Dalton L. Truluck |
Licensing
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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}}. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:45, 3 May 2011 | | 330 × 500 (34 KB) | Rewinn | Wade-Dahl-Till valve illustration, from its patent application. It is not clear than any actual such valves still exist to be photographed, so this illustration may be the only such available. It is freely viewable at http://v3.espacenet.com/textdoc?DB=EP |
File usage
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