Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7334511 | Saw blade and saw A saw blade comprising a series of teeth at a longitudinal edge thereof, arranged in alternate directions and formed in a tooth shape as defined by a first flank angle, a second flank angle, and a rake angle, is characterized in that the first flank angle lies betwe... | 02/26/2008 |
| 7225714 | Tooth form design for reciprocating saw blade A reciprocating saw has a tooth form that decreases the cutting time of the saw blade and extends the life of the saw blade. The tooth height is longer than conventional metal cutting reciprocating saws. Also, the tooth form has a larger gullet. The tooth rake angle... | 06/05/2007 |
| 7192503 | Method of manufacturing electro-optical device, method of dividing a plurality of substrates, electro-optical device substrate, and electro-optical device To realize a method of manufacturing an electro-optical device, which is capable of completely dividing a plurality of substrates used for the electro-optical device along division lines, in a method of manufacturing the electro-optical device, two or more substrate... | 03/20/2007 |
| 7036417 | Bandsaw blade with cutting extensions A saw blade that includes a bandsaw body and a plurality of unset teeth having a generally uniform height. The teeth are disposed on the bandsaw body. At least some of the teeth have a cutting extension that extends above the uniform height of the teeth. ... | 05/02/2006 |
| 7017465 | Cutting tool with grooved cutting edge A cutting tool includes a base made of metal having a plurality to cutting teeth along an edge of the base, wherein at least one cutting tooth has at least one notch in the cutting edge of the at least one cutting tooth. A tool is prepared by introducing a notch run... | 03/28/2006 |
| 7007578 | Apparatus for removing sawdust while cutting wood An apparatus for use in cutting wood and reducing dust accumulation on the wood includes first and second bands. The first band cuts the wood and creates saw dust during cutting of the wood. The second band removes saw dust from a kerf formed in the wood by the firs... | 03/07/2006 |
| 6979153 | Deep-grooving insert having stepped cutting edge A deep-grooving chip-forming cutting insert includes a rear mounting portion, a front cutting portion, and a pair of side walls, each side wall extending along the front and rear portions. The front cutting portion includes a front end surface, a top surface, and a ... | 12/27/2005 |
| 6427573 | Saw blade tooth form and method therefor A saw blade has a plurality of teeth with each tooth formed by a beveled gullet forming a trailing face, a beveled gullet forming a leading face and a planar surface forming a curved cutting face. The gullets forming the trailing face and the leading face... | 08/06/2002 |
| 6220139 | Saw blade A saw blade 1 comprises a preceding tooth 5 constructed by a straight tooth performing no saw setting operation in left-hand and right-hand directions and a succeeding tooth 7 for cutting a cutting groove formed by the above preceding tooth 5 to enlarge a... | 04/24/2001 |
| 6003422 | Synchronized variable tooth arrangements for saws A variable pitch band saw is provided which has a toothed edge comprising a plurality of recurrent groups of teeth. Each group includes an unset leading tooth and a plurality of teeth that are alternately set laterally to opposite sides of the saw. Each t... | 12/21/1999 |
| 5918525 | Reciprocating saw blade A reciprocating saw blade moved in opposite directions parallel to a longitudinal axis is formed with at least one row of longitudinally succeeding teeth having tips all lying on a common tip line parallel to the longitudinal axis and including even teeth... | 07/06/1999 |
| 5884547 | Saw blade tooth form A saw blade has a plurality of teeth with each tooth formed by a beveled leading face, a beveled trailing face and a chamfered surface located on the trailing face of each tooth. The trailing and leading faces are beveled in opposite directions in alterna... | 03/23/1999 |
| 5848473 | Saw blade A reciprocating saw blade comprises an elongated substantially flat body having a tang end and a distal tip end, a back edge and a spaced apart cutting edge. The cutting edge is formed of first and second pluralities of alternately and oppositely facing s... | 12/15/1998 |
| 5794503 | Disc cutter A disk-type cutting tool having a plurality of hardened inserts that are received in recesses formed in the periphery of a base disk. Each insert has a shank portion that is received in the recess and which defines a shoulder that is in abutting engagemen... | 08/18/1998 |
| 5713259 | Saw disc for a high speed hand sawing machine A high speed hand tool includes a saw disc having less than ten teeth, preferably four. Each tooth has a radial flank, which preferably inclines forward in the cutting direction, and a tangential flank, which has a small clearance angle. The teeth may hav... | 02/03/1998 |
| 5697280 | All purpose saw blade To provide a general-purpose saw blade which will saw different materials cost effectively, the saw blade includes a plurality of sets of teeth, each set including saw tooth having a large relief angle and a small tooth angle which provide fast cutting sp... | 12/16/1997 |
| 5606900 | Variable height, high performance, bandsaw blade and method of manufacture therefor A high performance, moderate cost bandsaw blade has a unique tooth configuration which enables it to provide high performance, while using standard manufacturing processes and available bandsaw equipment. The bandsaw blade has a straight back edge and a r... | 03/04/1997 |
| 5501129 | All purpose saw blade A new blade, and a method of cutting therewith, having repeating sets of teeth, each set having sub-sets which differ from each other in at least one cutting characteristic including straight teeth, primary cutting teeth which are left-sided and right-sid... | 03/26/1996 |
| 5361665 | Saw blade A saw blade comprises scratcher teeth which are not set, and shaving teeth which are set. All of the teeth have their leading and trailing lateral edges chamfered. The chamfering of successive teeth occurs at alternate sides of the blade. The scratcher te... | 11/08/1994 |
| 5231909 | Saw blade and method of making the same A saw blade includes the: (1) provision of a trapezial tooth between every two triangular teeth, the trapezial tooth having two opposite sides which extend towards one another at a top end, a distal bottom end opposite the top end and two opposite trapezi... | 08/03/1993 |
| 5139064 | Saw tooth A saw tooth, of which a number are removably mounted on a tree-felling saw head, includes a body portion having a lead cutter and a trailing primary cutter separated by a throat. The combined lead cutters function to cut a narrow side wall kerf on each si... | 08/18/1992 |
| 5038653 | Circular saw blade A circular saw blade is divided into a plurality of circumferential sections each including a number of cutting teeth provided along the circumferential edge of the saw blade. Between each pair of teeth, a gullet is formed having a depth in the radial dir... | 08/13/1991 |
| 4999915 | Saws and saw teeth and blades therefor A saw blade comprises a support member having at least one edge, and, spaced along that edge, a series of slots in each of which is secured a saw tooth and in which a portion of the tooth is located within the slot and a further portion extends beyond the... | 03/19/1991 |
| 4905558 | Apparatus for cutting slits in flexible plastics sheeting The invention relates to apparatus for cutting a series of spaced-apart continuous linear slits in a sheet of flexible plastics material, for example in the manufacture of an ajustable width blind. In one embodiment the apparatus includes a feed roller fo... | 03/06/1990 |
| 4893411 | Power sawblades for abrasive materials Sawblades for cutting materials containing abrasive grains or fibers with a power saw utilizing two reciprocating sawblades in contact with each other guided by a groove in a guidebar, all teeth on one blade pointing forwards and all teeth on the other bl... | 01/16/1990 |
| 4841824 | Saw chain for a chain saw A saw chain for motor-driven chain saws includes a cutting link which has three mutually adjacent supporting surfaces defining a U-shaped cutout for accommodating a hard metal insert in the form of a cutting plate therein. The support of the insert is pro... | 06/27/1989 |
| 4784034 | Saw blades and saw assemblies A saw blade assembly comprises a laminated structure of three side-by-side parallel strips, one two or all of which may have spaced teeth formed along one edge. Where only one strip has teeth, it is sandwiched between the two other strips and the teeth ar... | 11/15/1988 |
| 4782731 | Brush cutting blade A brush cutting blade having a curved slitter type/non-raker type primary cutting tooth and a preceding appendage forming a combination depth gauge and small stem slitter. The primary tooth terminates over the blade body with the cutting edge provided by ... | 11/08/1988 |
| 4690024 | Saw blade and tip therefor A circular saw blade (20) includes a circular body (22) with a plurality of equally spaced teeth (32) and a corresponding plurality of gullets (34) formed integrally with and about the periphery of the body. Each alternate tooth (32) of a first set of alt... | 09/01/1987 |
| 4492141 | Saber saw blade The present invention relates to a saber saw which comprises a blade having a plurality of teeth. Each tooth has a cutting edge extending from a top to a deep recess and having an inclination angle of 90° to 120°. Each tooth also has a tooth face formed... | 01/08/1985 |
| 4463645 | Circular saw A circular saw having dual chip cutting action in which all of the saw teeth are of like width and radial height and have similar tooth geometry with the working surface of the leading tooth face disposed at a negative rake angle and having side portions ... | 08/07/1984 |
| 4461198 | Sawblade A sawblade has teeth of a height corresponding to the thickness of the blade and chip spaces in the interstices between respective teeth opening into both sides of the blade; the bottoms of alternate chip spaces are inclined to opposite sides of the blade... | 07/24/1984 |
| 4179967 | Variable tooth saw blade A saw blade is provided with an arrangement and form of teeth which reduces vibration, cutting noise and chatter, and which enhances cutting speed and blade life. In addition to having teeth arranged in recurrent groups wherein the teeth alternately decre... | 12/25/1979 |
| 4135421 | Quiet running circular saw blade A circular saw blade has block-like tooth tip inserts of hard metal, secured at circumferentially spaced intervals to the peripheral portion of a disc-like blade body having opposite flat side surfaces. The gullet in front of each insert, conventionally p... | 01/23/1979 |
| 4133236 | Sharpenable cutting blade with skew-cut notches for use in sheet material cutting apparatus A sharpenable cutting blade with a series of alternately inclined skew-cut notches along its main cutting edge. Each notch defines a pair of auxiliary cutting edges respectively on opposite sides of the main cutting edge and facing in opposite longitudina... | 01/09/1979 |
