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 |
| 6547892 | Flux cored wire with superior cracking resistant property for welding ferrite stainless steel A flux cored wire for welding a ferrite stainless steel is disclosed. The flux cored wire includes in weight %, 0.04% or less of C, 0.1~1.0% of Si, 0.1~1.0% of Mn, 0.02% or less of P, 0.02% or less of S, 10~25% of Cr, 0.3~1.5% of Ti+Nb, 0.04% or less of N... | 04/15/2003 |
| 6467119 | Pointing device cleaner and method of use The invention is a cleaning device (2) for a computer mouse (86) or other similar pointing device that can clean the entire surface of a position roller (90)quickly, easily, completely, and without damage to the workings of the mouse (86). The device has ... | 10/22/2002 |