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Original file (2,199 × 1,599 pixels, file size: 130 KB, MIME type: image/png)
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Summary
| Description | M-325 | ||||||||||||||||||||
| Date | |||||||||||||||||||||
| Source | US patent #2,877,565 | ||||||||||||||||||||
| Author |
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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 | 12:42, 30 November 2004 | | 2,199 × 1,599 (130 KB) | Matt Crypto | M-325, image from US patent #2,877,565. {{PD}} |
File usage
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