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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 |
| 4326798 | Pyrometer system using separated spectral components from a heat source A pyrometer system for the measurement of the temperature of a primary source of heat which might be contaminated by radiation from a transient spurious source of heat at a higher temperature, and in which the presence of radiation from the spurious sourc... | 04/27/1982 |
