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| Description |
English: Permanent wave machine invented by Marjorie Joyner in 1928 (The first African American woman to receive a patent) - Patent Expired |
| Source | Scan of patent diagrams |
| Author |
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In general, the contents of United States patents are in the public domain.
In specific cases, patent applicants and holders may claim copyright in portions of those documents. In those specific cases, applicants are required to identify the portions that are protected under copyright, and are additionally required to state the following within the body of the application and patent (see 37 CFR 1.71(d) & (e) and 37 CFR 1.84(s), and MPEP § 608.01(e) & (w) and MPEP § 1512):
The original patent should be checked for the presence of such language before an assumption is made that the contents are in the public domain. (This template can be replaced by {{PD-US-patent-no notice}} in such cases.)
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File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:34, 15 February 2006 | 376 × 619 (17 KB) | Pschemp | Permanent wave machine invented by Marjorie Joyner in 1928 (The first African American woman to recieve a patent)- Patent Expired {{PD-US-patent}} | |
| 03:33, 9 February 2006 | 200 × 379 (8 KB) | Pschemp | Permanent wave machine invented by Marjorie Joyner in 1928 {{PD-US-patent}} |
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