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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 |
| 5367953 | Roller offset printing apparatus Disclosed is a roller offset printing apparatus which comprises image sensors 14 and 15 disposed on a linear stage 4, and position correction motors 8 to 13 disposed in the respective peripheries of a master plate 6 and a work plate 7, wherein positions o... | 11/29/1994 |
| 4993166 | Adjustable pin guide for use in screen printing This invention relates to an aligning structure for aligning pin-receiving holes on a screen frame used in screen printing relative to upright pins mounted on a pin bar. The aligning structure, includes a pair of plates clamped on the frame. A first plate... | 02/19/1991 |
