File:Johnson 1954 ice boring device patent.png
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Summary
| Description |
English: 1954 patent drawing of ice auger designed by Melvin C. Johnson |
| Date | |
| Source | US Patent 2,666,623 |
| Author | Melvin Johnson |
Licensing
|
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 | 02:41, 20 November 2017 | | 401 × 871 (105 KB) | Mike Christie | User created page with UploadWizard |
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