File:US3824437.jpg
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US3824437.jpg (459 × 286 pixels, file size: 30 KB, MIME type: image/jpeg)
Summary
| Description |
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
|
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
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:04, 10 May 2012 | | 459 × 286 (30 KB) | wikimediacommons>Cblambert | Trying to sort out copyright infringement issue. |
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