Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 7184032 | Tactile overlays for screens An overlay for use with a display screen, comprising at least one first tactilely readable area, wherein the display screen includes a first feature thereon, wherein the tactilely readable area includes information in a tactilely readable format, and wherein the inf... | 02/27/2007 |
| 5283987 | Saw blade clamp unit A saw blade clamp unit for holding saw blade in a manner to permit machining of side faces of hard material tips provided upon the teeth of the saw blades. The saw blade clamp unit clamps a saw blade tooth adjacent to a saw blade tooth tip being machined,... | 02/08/1994 |
| 5101690 | Saw blade top and face grinder A top and face grinder for a circular saw blade includes an indexing apparatus which interposes a stop into the path of the teeth of the saw blade from a position laterally displaced from the plane of the saw blade. This stops rotation of the blade and pe... | 04/07/1992 |
| 5003843 | Saw chain holding mechanism for grinding machines A base is arranged to be mounted on a saw chain grinding machine adjacent to a saw chain holding bar. A shaft has first and second projections engageable with the cutter elements for holding the cutter elements down and laterally against an opposite side ... | 04/02/1991 |
| 4683780 | Saw chain sharpener A saw chain sharpener for sharpening the left hand and right hand cutting teeth and the rakers of a saw chain while the chain is mounted in situ on a saw bar. The apparatus includes a base, a saw bar clamp mounted on the base for clamping a saw bar in a s... | 08/04/1987 |
| 4657234 | Chain saw holder A chain saw holder for holding and supporting a chain saw during refueling, repair and other maintenance operations is disclosed. The chain saw holder includes a clamp for clamping to a fixed support such as a work bench, fence post, or tree branch. An ex... | 04/14/1987 |
| 4630509 | Articulated assembly of members An articulated assembly of members such as a workpiece support in a machine tool comprises three and preferably four members, each successively rotatably mounted on the previous member, and each successive axis of rotation being inclined relative to the p... | 12/23/1986 |
| 4503735 | Chain saw sharpening device A clamp for sharpening chain saws does not require removal of the saw chain from the saw prior to the sharpening operation. The clamp comprises a supportive backing plate, a threaded member for fixing the saw blade into position relative to the plate, and... | 03/12/1985 |
| 4495398 | Machine for working flat workpieces by cutting A machine for working workpieces with a round outer contour by cutting has a coordinate table arranged to displace a workpiece in x-direction and y-direction and having a clamping guide extending in x-direction, a cutting device acting substantially in z-... | 01/22/1985 |
| 4483218 | Clamping device for a saw blade in a machine for working on saws Two clamping jaws (30, 32) disposed opposite each other and operable by fluid pressure are connected to each other by gearing (38, 40, 50) which guides them symmetrically with respect to a central plane (B). The gearing (38, 40, 50) comprises two racks (3... | 11/20/1984 |
| 4398437 | Saw chain depth gauge grinder An improved saw chain depth gauge grinder longitudinally positions the cutter links of saw chains with their depth gauges in a grinding position for grinding while preventing contact with other portions of the cutter link as they pass through the grinding... | 08/16/1983 |
| 4375173 | Saw chain holding device A device for holding a saw chain during sharpening of the chain cutters which prevents wobble by gripping both the cutter train and the drive train of the saw chain.... | 03/01/1983 |
| 4355551 | Chain saw bar attachment A chain saw bar attachment is disclosed for a conventional chain saw bar which has a peripheral track for guiding a saw chain and which is detached from a chain saw. The attachment includes an elongated body, a mounting mechanism for mounting the body to ... | 10/26/1982 |
| 4248412 | Support for sharpening chain saws at the work site A support for sharpening chain saws is disclosed consisting of an L-shaped member having a threaded spike adapted to be screwed into the cut surface of a tree trunk. The horizontal arm of the member is provided with clamping means to hold fast the blade o... | 02/03/1981 |
| 4157047 | Hand saw work holder A device for holding a hand saw firmly in place on a traversing table, and employing in combination, a lead screw, a tracing dog, index plate, and index stop, all of which cooperate to evenly divide and space the teeth per inch of hand saw, while presenti... | 06/05/1979 |
| 4040314 | Chain saw blade sharpening accessory A grinder accessory for use with a bench grinder including a uniquely designed three element structure and associated connecting and releasing means for attaching the accessory to the grinder when chain saw blades are to be sharpened while permitting quic... | 08/09/1977 |
