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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 |
| 4345233 | Manual switch with timed electro-thermal latch release A momentary ON rocker button switch (2) with bimetal detent latching (36) in the ON position and releasable by a heater (42) wound on the bimetal (36), the heater (42) being controlled through the output of a solid state timing circuit (TC, R1, C1) housed... | 08/17/1982 |
