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 |
| 4299505 | Shift mechanism The invention concerns a shift mechanism for typewriters having a carriage in which the shift instruction is transmitted by two distinct interlocks of which one is in an active position when the other is in an inactive position. Each interlock is controll... | 11/10/1981 |
| 4071719 | Keyboard switch assembly having actuator interlocking keyboard shift and shift lock and release mechanism A keyboard shift and shift lock and release mechanism consisting of two shift keyswitches and one shift lock keyswitch is provided by the interaction of cams molded on the actuating plungers of the keyswitches and a slide member on each keyswitch which ca... | 01/31/1978 |
| 4023664 | Automatic typewriter Apparatus for converting code responsive, bail operated electric typewriter into an automatic typewriter. The apparatus includes discrete sensing, actuating or combined sensing-actuating assemblies disposed in existing cavities formed by the typewriter me... | 05/17/1977 |
| 3972404 | Typewriter shift mechanism Depressing the upper case shift key lever pivots a balance beam from a first to a second position, thereby raising the lower case shift lever to an inactive position. When the upper case shift key lever is released, the balance beam is returned to its fir... | 08/03/1976 |
| 3944043 | Shift mechanism in syllabic typewriters In typewriters comprising groups of type-bars, each group having a distinct printing point, each group being supported by a particular sector and certain sectors being movable independently from the others: A shift mechanism which allows the typist to put all ... | 03/16/1976 |
