File:Dynatron US-Patent 1387984.png
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| Description |
English: Dynatron Patent page Nr 1. from Albert W. Hull (1921) |
| Date | |
| Source | US Patent 1387984 |
| Author | Albert W. Hull |
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}}. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:12, 22 February 2013 | | 1,077 × 1,798 (87 KB) | Wdwd (talk | contribs) | == {{int:filedesc}} == {{Information |Description={{en|Dynatron Patent page Nr 1. from Albert W. Hull (1921)}} |Source=US Patent 1387984 |Date=16. August 1921 |Author=Albert W. Hull }} == {{int:license-header}} == {{PD-US-patent-no notice}} [[Categor... |
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