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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 |
| 5604528 | Method and apparatus for providing periodic subscription television services A method and apparatus for providing periodic subscription television services comprises a way for subscribers who cannot afford the fees for full time television services such as a regular cable television service to obtain subscription service to a plur... | 02/18/1997 |
| 5311325 | Method and apparatus for providing periodic subscription television services A method and apparatus for providing periodic subscription television services comprises a way for subscribers who cannot afford the fees for full time television services such as a regular cable television service to obtain subscription service to a plur... | 05/10/1994 |
| 5278908 | Interdiction method and apparatus with programmable jamming effectiveness An off-premises method and apparatus for the interdiction of unauthorized channels of a broadband cable television signal includes common circuitry for adjusting the amplitude and equalization levels of the broadband CATV signals and one or more subscribe... | 01/11/1994 |
| 5265160 | Interdiction method and apparatus with pulsed mode jamming An off-premises method and apparatus for the interdiction of unauthorized channels of a broadband cable television signal includes common circuitry for adjusting the amplitude and equalization levels of the broadband CATV signals and one or more subscribe... | 11/23/1993 |
| 5243647 | Method and apparatus for broadband signal distribution Apparatus for broadband signal distribution is equipped with a detector for detecting when the apparatus is open and is further adapted to receive an entry code generator. If the entry code generator is not installed or, if installed, fails to generate an... | 09/07/1993 |
