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In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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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 |
| 6188004 | Apparatus and method for coupling electronically stored musical performances to the tracker bar of an automatic musical instrument A system for adapting a tracker bar operated automatic musical instrument to play electronically stored performances includes, in one embodiment family, a channel plate member having parallel channels in the upper face. First and second spaced apart holes... | 02/13/2001 |
| 6166307 | Apparatus for automating a stringed instrument An automated stringed musical instrument including a device for plucking the strings of the instrument, a device for fretting the strings, and a tension-maintaining linkage for maintaining the tension in the strings, such that the instrument can be remote... | 12/26/2000 |
| 6049031 | Magnetic valve system for a musical instrument A magnetic valve uses neodymium magnets to maintain itself in a state, either closed or open. Upon applying electrical signals to a coil, the valve state is changed. In the open state fluid may readily flow through the valve, whereas the closed state uses... | 04/11/2000 |
| 4619177 | Musical instrument pneumatic actuator A musical instrument pneumatic actuator uses valve seats and a vacuum tube which are integral with one of two plastic main body pieces. An anti-warp brace and curved recessed portion are respectively used to minimize warpage and wear on the bellows. A bev... | 10/28/1986 |
| 4145947 | Electro pneumatic player piano The specification discloses a pneumatic player piano which utilizes an electric motor roll drive. The roll drive is actuated by a mechanical switching arrangement which responds to the system vacuum so as to simulate the operation of a conventional air mo... | 03/27/1979 |
