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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 |
| 7334617 | Solid rubber tire with flexible hub and replaceable tire tread A solid rubber tire with a flexible drive hub having a multiplicity of hub ribs and grooves formed around the periphery of the flexible drive hub and a solid rubber tire tread replaceably mounted on the flexible drive hub having a multiplicity of interior tread groo... | 02/26/2008 |
| 7044179 | Elastic wheel An elastic wheel includes a disk (1) secured to an axle hub, a rim (12) for mounting a tire, and an elastic member (10) arranged between the inner peripheral surface of the rim (12) and the outer peripheral surface of the disk (1).... | 05/16/2006 |
| 5486125 | Drive transmission system for vessel propelling equipment A drive transmission system for a vessel propelling equipment 1 provided with a clutch operating device that can easily be installed comprises a shift slider 40 axially slidable within a propeller shaft 9 to move a clutch gear 30 through a clutch shifter ... | 01/23/1996 |
