File:US3824437.jpg
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US3824437.jpg (459 × 286 pixels, file size: 30 KB, MIME type: image/jpeg)
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Summary
DescriptionUS3824437.jpg |
English: F. Blaschke's US3824437 'Method of Controlling Asynchronous Machines', image of the patent with no notice of exception so is in the public domain |
Date | |
Source | US Patent 3824437 |
Author | Felix Blaschke |
Licensing
Public domainPublic domainfalsefalse |
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}}. |
Items portrayed in this file
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10 May 2012
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:04, 10 May 2012 | 459 × 286 (30 KB) | Cblambert | Trying to sort out copyright infringement issue. | |
17:46, 10 May 2012 | 459 × 286 (30 KB) | Cblambert |
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