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 |
| 4322173 | Half-spacing feed mechanism for marking machine A marking machine for marking metal nameplates, tags or the like. The marking machine employs a work table supported on a carriage which is moveable into contact with a marking wheel to perform a printing operation. Improved advancing means are provided f... | 03/30/1982 |