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 |
| 7069878 | Animal training device A hand held training device capable of producing discreet clicks when operated by a user, having a control by which the user can vary the volume and/or tone of the clicks produced. ... | 07/04/2006 |
| 4661073 | Code tutoring system A Morse code tutoring system: a computer with an appropriate program and a code practice oscillator interfacing to it. In one mode of operation, the operator uses a straight key to produce code in the oscillator which is monitored by the computer, and ana... | 04/28/1987 |
| 4255749 | Apparatus for converting code signal to visual display Apparatus for converting a train of code signals representative of a letter, number, or symbol to a visual display of such corresponding letter, number, or symbol. The train of signals includes individual signals of at least two distinct time durations, t... | 03/10/1981 |
| 4006305 | Blinker practice light A code practice blinker light is to be used in conjunction with a tape or record player sending code. The output signal of the tape or record player drives the input base circuit of a transistor, the switching action thereof causing the closing of a serie... | 02/01/1977 |
