Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 4621542 | Speed change control device for continuously variable transmission A speed change control device for a continuously variable transmission has a carrier adapted to rotate about a predetermined axis, a twin cone adapted to rotate integrally with the carrier while being held by the carrier and rotatable about a central axis... | 11/11/1986 |
