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 |
| 7395603 | Reciprocating saw The reciprocating saw has a main body, a support member, a guide shoe, a locking member and an engaging member. The support member can be slid relative to the main body. The guide shoe is attached to an anterior end of the support member. The locking member can be s... | 07/08/2008 |
| 7363713 | Reciprocating power tool It is an object of the present invention to provide a useful technique for effectively reducing vibration in a reciprocating power tool with a simple structure. According to the present invention, a representative reciprocating power tool includes a motor, a tool bi... | 04/29/2008 |
| 7350444 | Table saw with improved safety system A table saw having an adjustable blade, a detection system to detect contact between a person and the blade, and a brake mechanism to engage and stop the blade upon detection of contact between the person and the blade is disclosed. The saw includes a brake position... | 04/01/2008 |
| 7328514 | Power tool bearing arrangement The invention relates to a power tool with a reciprocating blade, such as a jigsaw, in which the blade can have linear and pendulum movement components imparted thereon and also to a blade holder assembly. There is provided a bearing for a holder member which allows... | 02/12/2008 |
| 7290472 | Miter saw with improved safety system Miter saws are disclosed having a base, a blade supported by the base, a detection system adapted to detect a dangerous condition between a person and the blade, and a reaction system associated with the detection system to cause a predetermined action to take place... | 11/06/2007 |
| 7257900 | Canted saw blade A saw blade incorporates an integrated cant angle. The saw blade includes a cutting portion having a toothed edge and opposite edge. The toothed edge defines a cutting plane. A shank portion extends from the cutting portion and is laterally offset from the opposite ... | 08/21/2007 |
| 7246446 | Adjustable guide rail for hand tools A method and apparatus are provided for constructing and operating an adjustable guide rail for hand tools, by attaching an elongated blade to a guide with a locking ratcheting apparatus. The locking ratcheting apparatus is thumb-operable. The elongated blade includ... | 07/24/2007 |
| 7210387 | Vertical band saw machine A vertical band saw machine includes a base, an upright post extending from the base, amounting frame slidably retained relative to the upright post, upper and lower blade mounting pulleys and a tension-equalizing guider pulley rotatably mounted on the mounting fram... | 05/01/2007 |
| 7197826 | Compass saw with a suction connection arrangement A suction connection arrangement for a compass saw includes a suction connection element (26) for connecting suction flow producing apparatus with the compass saw, a suction channel (24) for connecting the suction cross-section (18) of the saw w... | 04/03/2007 |
| 7174641 | Cutting tool The present invention provides a technique for improving the workability of a cutting tool. According to the present invention, a cutting tool may comprise a body, a base, a sub-base and a parallel ruler. The body may have a blade that can be rotationally driven. Th... | 02/13/2007 |
| 7159323 | Circular saw for facilitating straight cuts and/or cuts at a desired angle relative to a workpiece edge A power saw having one or more features for facilitating straight line and/or angled cuts, including (1) at least two sets of non-slip wheels connected to the bottom plate, each set of wheels comprising an axle having at least two wheels that are fixed to rotate at ... | 01/09/2007 |
| 7137420 | Mortiser tool A mortiser tool comprises a drill bit, a cutting element mounted around the drill bit and a motor means. In use a motor rotates the drill bit independently of the cutting element, and in use a motor moves the drill bit in a first reciprocating action, in which the c... | 11/21/2006 |
| 7107691 | Electric knife adapted for safely carving pumpkins and other fruits and vegetables According to one embodiment of the present invention, an electric knife is provided that includes a blade that is adapted to cut the pulp and shell of pumpkins and other fruits and vegetables but not readily cut the skin and flesh of humans. According to a preferred... | 09/19/2006 |
| 7089671 | Circular saw with an improved lower blade guard A circular saw (1) includes a base plate (2) and a saw blade assembly (3) including a lower blade guard (9) for covering a saw blade (6). The blade guard includes a sleeve portion (10) rotatably fitted on a bearing box (8... | 08/15/2006 |
| 7066221 | Plate joiner A plate joiner including a fence support, a drive, and a fence system. The fence support includes a cutter and a contact surface, which defines a cutter slot. The cutter is arranged and configured to protrude from fence support through cutter slot to make a plunge c... | 06/27/2006 |
| 7055250 | Machine tool for cutting plate and sandwich panels A machine for cutting plate-shaped workpieces, incorporates a tool guide (7), an operating handle (13), and a cutting tool (6) which revolves along the tool guide (7). By moving the operating handle (13), the tool guide (7) ... | 06/06/2006 |
| 7044120 | Baseplate for tool A baseplate for a tool having a support member with a passage way therein which has an inlet for receiving fluid and at least one outlet for directing fluid underneath the support member and rotating means attached to the bottom of the support member. The invention ... | 05/16/2006 |
| 7043845 | Trim attachment for portable circular saw The trim attachment for a portable circular saw is generally L-shaped, having a generally rectangular, planar, horizontal mounting plate and a perpendicular fence extending downward from a lengthwise side thereof. The perpendicular fence forms an insert portion ther... | 05/16/2006 |
| 7007686 | Repair assembly for a worn skid plate of a circular saw A repair assembly for the skid plate of a circular saw and its associated method of repair. If a circular saw has a skid plate that is worn to a point where it needs replacement, this repair assembly is used to reinforce the worn skid plate so it can again be used. ... | 03/07/2006 |
| 7000605 | Engraver apparatus and method A concrete engraver apparatus including a carrier for use with a hand-held engraver. The hand-held engraver is detachably mounted to the carrier. The carrier has wheels and a handle attached to an enclosure. The enclosure includes a vacuum mount for attaching a vacu... | 02/21/2006 |
| 6959847 | Saw frame provided with a roll-tip for cutting glass Disclosed is a saw frame having wheel cutters for cutting glass. In particular, the present invention relates to a saw frame having wheel cutters respectively mounted to both a saw frame and a handle, and with a plurality of glass bending grooves formed at the botto... | 11/01/2005 |
| 6896016 | Plate joiner A plate joiner including a fence support, a drive, and a fence system. The fence support includes a cutter and a contact surface, which defines a cutter slot. The cutter is arranged and configured to protrude from fence support through cutter slot to make a plunge c... | 05/24/2005 |
| 6875222 | Blade for resection of bone for prosthesis implantation, blade stop and method A kit (10) for resection of bone (12) for use in implantation of a joint prosthesis (14) is provided. The kit (10) includes a guide (16), a tool (26) and a stop (32). The guide (16) defines an opening (20 | 04/05/2005 |
| 6757982 | Safety improvements for power tool A hand-held power tool includes a cutting blade within a housing (5) and a guard (10) placed over the operating head of the tool. The guard is movable in the direction (1) in order to expose the blade during cutting. The sliding mechanism is imp... | 07/06/2004 |
| 6691417 | Pruner attachment apparatus for a power tool A pruner attachment apparatus includes a body releasably attachable to a shoe of a power tool of the type having a reciprocating saw blade. The body includes a front face for engaging a workpiece. The pruner attachment apparatus further includes a hook me... | 02/17/2004 |
| 6688004 | Line-of-cut indicator for a cutting tool A line-of-cut indicator for use with a cutting tool including a pointer element that may be moved between an open position substantially in front of the footplate of the cutting tool and a closed position substantially behind the front of the footplate of... | 02/10/2004 |
| 6612349 | Plate joiner A plate joiner including a fence support, a drive, and a fence system. The fence support includes a cutter and a contact surface, which defines a cutter slot. The cutter is arranged and configured to protrude from fence support through cutter slot to make... | 09/02/2003 |
| 6591509 | Floating bench saw guide A floating bench saw guide for guiding a portable circular saw along a workpiece while sawing the workpiece, has a cradle for retaining a portable circular saw, a saw plane across the cradle, and a guide lip movably affixed to the cradle. A pair of gage b... | 07/15/2003 |
| 6550147 | Saw attachment An attachment for a reciprocating saw comprises an offset member mounted on the drive head of the saw and comprising a lateral extension which holds a saw blade clear of the saw body The attachment also comprises a guard member having a planar surface ada... | 04/22/2003 |
| 6484409 | Pruner attachment apparatus for a power tool A pruner attachment apparatus for a power tool having a body, a shoe extending from the body, and a saw blade interconnected to the body for reciprocating motion. The pruner attachment apparatus includes a mounting member, a hook member and a biasing mech... | 11/26/2002 |
| 6438851 | Circular saw cutting aid The present invention comprises a circular saw aligning device which is not only easily releaseable but also entirely removeable from functioning engagement with either a specially made or prior art portable circular saw. An abutting assembly of the devic... | 08/27/2002 |
| 6412179 | Cutting guide apparatus for guiding portable power cutting tools A cutting guide apparatus for use with a portable power cutting tool and including a guide base plate, locking mechanism for removably attaching the cutting guide apparatus to an upper blade guard of the cutting tool, and a control mechanism to control th... | 07/02/2002 |
| 6367468 | Base plate for masonry tool A baseplate for a masonry tool having a support member with a passageway therein which has an inlet for receiving fluid and at least one outlet for directing fluid underneath the support member and rotating means attached to the bottom of the support memb... | 04/09/2002 |
| 6357123 | Jigsaw apparatus A jigsaw apparatus includes a motor housing having a motor drive, a blade reciprocally powered by the motor drive, and a blade support arrangement that includes an arm that extends to the rear (or side) of the motor housing, the arm having a free end that... | 03/19/2002 |
| 6317988 | Saber saw having shoe to be pressed against workpiece A saber saw having a shoe pressing against a workpiece for holding an entire device at its given position during cutting operation. A saw blade extends from a main body and is reciprocally moveable in the extending direction. The shoe is pivotally support... | 11/20/2001 |
| 6308423 | Cutting tool with an improved guide repositioning structure A reciprocating saw includes a hexagonal head bolt (11) for releasably tightening a guide shoe (6) and a manually-operated bolt-tightening lever (15) fitted over the bolt (11). The bolt-tightening lever (15) includes a lock plate (17) which has at its fro... | 10/30/2001 |
| 6305089 | Cutting guide A cutting guide for use with a cutting device having a blade is provided. The cutting guide includes a bracket for securing the guide to the cutting device, a base connected to the bracket for supporting mounting stresses of the bracket, an ankle having a... | 10/23/2001 |
| 6205897 | Pipe cutter and method of cutting pipe The pipe cutter includes a jigsaw with a motor that reciprocates a saw blade back and forth. A way is clamped to the jigsaw. A workpiece holder is slidably mounted on the way. The workpiece holder has a workpiece slot with a base, two side walls and a saw... | 03/27/2001 |
| 6021826 | Powered cutting saw system A plate-joinery system includes a chain-saw plate joiner where the cutting mechanism includes a cutting-chain driven about a saw-bar. The cutting mechanism of the chain-saw plate joiner may be advanced on rails to one of a set of predetermined depths. The... | 02/08/2000 |
| 5865230 | Plate joiner A plate joiner including a fence support, a drive, and a fence system. The fence support includes a cutter which is arranged and configured to protrude through a cutter slot in a contact surface to make a plunge cut into a surface of a workpiece. The driv... | 02/02/1999 |