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Magician Harry Houdini patented a "Diver's Suit" enabling the wearer to "quickly divest himself of the suit while being submerged and to safely escape and reach the surface of the water."
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| Number | Title | Issue Date |
| 6967270 | Strummable electric harpsichord A musical instrument includes a plurality of strings and a plurality of pluckers. The strings are tuned in an ascending sequence, such as a chromatic sequence. The pluckers are associated with a different one of the plurality of strings and are adapted to pluck the ... | 11/22/2005 |
| 5393925 | Apparatus for playing a stringed instrument An apparatus for playing a stringed instrument comprises a supporting frame, a plurality of pokers, at least one picker, a plurality of actuating devices and a computer interface; at least one tension controller may also bey attached. The frame supports t... | 02/28/1995 |
| 4037503 | Power operated guitar device A power operated device that is mounted on a musical stringed instrument such as a guitar to selectively bring one or a desired group of rotating members into light pressure contact with strings of the instrument to cause one or a desired group of strings... | 07/26/1977 |
