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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 |
| 6973855 | Method for manufacturing hair clipper blade A method for manufacturing a hair clipper blade includes providing a blank with a comb teeth shaped cutting edge portion, and forging the cutting edge portion to have an acute tip angle. ... | 12/13/2005 |
| 6941660 | Power hand tool with saw blade and pipe engaging bracket for cutting a pipe A electrical power tool with a circular saw blade attached to a drive shaft of an electric motor. The power tool includes a pipe engaging bracket. The pipe-engaging bracket includes a “L” shaped bracket arm having a first arm member and a second arm member. The ... | 09/13/2005 |
| 5251378 | Cutting implement A cutting implement employing a pair of rollers placed vertically one above the other, the rollers having sharpened edges that slightly overlap and touch each other at a selected position, forming a cutting point where they touch. When the rollers are rot... | 10/12/1993 |
| 4391173 | Shearing cradle A shearing cradle to support a sheep in a reclined position on rollers. Shearing device situated between a pair of rollers, so that as the rollers rotate, the sheep is shorn by the shearing device.... | 07/05/1983 |
| 4347634 | Precision pipe cutter and reamer combination A precision hand-held pipe cutting tool is provided utilizing an elongated body which is hand-gripped and contains an axially aligned motor, and a rotating saw blade parallel and adjacent to an angularly adjustable dial with a variety of depth limiting no... | 09/07/1982 |
| 4272948 | Oscillating knife cutting apparatus An oscillating knife cutting apparatus preferably for use on a row crop harvesting unit of a forage harvester to sever crop material from its standing position in a field as it is delivered into the harvester. The apparatus comprises a main support with a... | 06/16/1981 |
| 4051760 | Shearing apparatus An improved cutting unit for incorporation in a sheep-shearing apparatus having a flexibly curvable comb which conforms to the curved contours of an animal's body, thereby enabling a larger area to be fleeced at any one stroke, whether the apparatus is ma... | 10/04/1977 |
