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 |
| 6124729 | Field programmable logic arrays with vertical transistors A field programmable logic array with vertical transistors having single or split control lines is used to provide logical combinations responsive to an input signal. The transistor is a field-effect transistor (FET) having an electrically isolated (float... | 09/26/2000 |