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 |
| 7013393 | Universal intelligent card for secure access to system functions A method and apparatus for secure access to secured system functions utilizing a universal access card. The card includes a bank of tuned amplifier circuits and tuned audio transducers to maximize audio output power from the card, such as for telephone communication... | 03/14/2006 |
| 4888822 | Apparatus and method for determining cost of telephone calls A device having a keyboard and a display for determining and displaying information relating to the cost of telephone calls. The device contains information as to the identify of exchanges which may be called, as well as information as to the cost paramet... | 12/19/1989 |
