...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 4517954 | Removable mount for cutting means A cutting element, for use on the cutting member of a variety of cutting machines, particularly for stone cutting machines. The cutting element includes a base member substantially permanently fixable to the cutting member, and a cap member selectively en... | 05/21/1985 |
| 4516560 | Abrasive cutting wheel and method of cutting abradable material A circular cutting wheel having a plurality of radial slots evenly spaced about the periphery thereof and a diamond-bearing arcutely shaped cutting member bonded to the periphery thereof between each of the radial slots, the core further including a plura... | 05/14/1985 |
| 4513544 | Method of sawing crystalline rods, and multiple-blade internal-hole saw for carrying out the method Crystalline rods or blocks can be sawed into thin wafers by sawing the rod r block into a plurality of wafers that are connected to each other. The wafers can be connected by introducing a connecting agent after each sawing step, into the resulting cutting... | 04/30/1985 |
| 4505251 | Cutting segment with porous center section A cutting segment for stone and the like, the segment having a porous center section. A conventional mixture of cement and diamonds is made, and a quantity of filler is added to the mixture. The filler will withstand the sintering process, but subsequentl... | 03/19/1985 |
| 4498449 | Precision tensioning device for ID saw blade An improved tensioning device is provided for use in an inner diameter saw blade housing. A tensioning ring, disposed in an annular clamping member, is internally threaded at plurality of locations along its circumference. An associated plurality of screw... | 02/12/1985 |
| 4484560 | Diamond segmented saw blade A diamond segmented saw blade having a steel center is provided with a plurality of sockets about the rim and a plurality of cutting tip supports having diamond impregnated tips. Each socket is provided with an upper surface inclined upwardly and inwardly... | 11/27/1984 |
| 4475527 | Ingot slicing machine and method An improvement in a method for simultaneously slicing one or a multiplicity of boules of silicon into silicon wafers, the improvement of which comprises forming a plurality of vertical stacks of horizontal saw blades of circular configuration arranged in ... | 10/09/1984 |
| 4462724 | Photochemically machined cutting wheel A cutting wheel comprises a thin metal disk having an inner peripheral cutting edge. The cutting wheel is photochemically machined from a flat metal sheet and has locating holes therethrough the diameters of which are held to a very close tolerance.... | 07/31/1984 |
| 4462382 | Circular saw for cutting green concrete and asphalt Slotted saw blades are shown with wide slots in which hardface inserts extend below the bottoms of the slots and interlock with the core, extend above the periphery of the core, and extend at a negative hook angle for the direction of core rotation. In va... | 07/31/1984 |
| 4461268 | Diamond saw A diamond saw for cutting hard materials, in which a steel plate is fixed with a sintered body consisting of diamond abrasive granules and a bonding metal powder, characterized in that a plurality of grooves having openings are provided at the edges of bo... | 07/24/1984 |
| 4407263 | Cutting blade An improved cutting blade for use in cutting hard but brittle materials is proposed. It has a base plate, both sides of which are formed with a plurality of grooves. Abrasive grains are affixed to the blade in these grooves in such a manner that these abr... | 10/04/1983 |
| 4345579 | Cutting wheel A cutting disk or wheel, particularly for the dry cutting of natural and artificial stone material, especially asphalt and concrete, comprises a single-layer saw plate of a high alloy special steel with ribs formed on the circumference by radial separatin... | 08/24/1982 |
| 4337750 | Abrasion resistant diamond blade A saw blade having diamond or other abrasive segments bonded to the periphery of a steel center includes segments of a hook shape with a leg extending radially of the saw. Hooks of different length are provided whereby erosion of the blade at the joints b... | 07/06/1982 |
| 4291667 | Cutting wheel A cutting wheel for natural and artificial rock, such as road surfaces of asphalt or concrete, comprises a carrier disk with cutting segments in a regular series around the circumference of the carrier disk. The series is interrupted at spaced intervals, ... | 09/29/1981 |
| 4267814 | Abrasive saw blade for trapezoidal grooving A saw blade for producing a trapezoidal shaped groove in a surface including a circular support disc and a plurality of spaced-apart abrasive elements supported about the periphery of the support disc wherein the abrasive elements include a first set of a... | 05/19/1981 |
| 4262650 | Expensive abrasive base cutting wheels with a metallic core notched at the periphery A rotatable cut-off wheel includes a metal core notched at its periphery and having added abrasive elements for cutting material. The notches each have a profile which is non-parallel with the axis of rotation of the wheel, to reduce noise when the wheel ... | 04/21/1981 |
| 4219004 | Flexible, self-supporting blade for cutting electronic crystals and substrates or the like A diamond-nickel blade for cutting electronic crystals and substrates or the like comprising diamond particles in a nickel matrix. The nickel matrix is the sole support for the blade and the volume of the nickel matrix is no greater than about 55% of the ... | 08/26/1980 |
| 4180048 | Cutting wheel An improved cutting wheel for dicing semiconductor wafers is described. The cutting blade of the wheel is a thin disc consisting of finely divided abrasive particles embedded in a nickel matrix. The surface of the nickel is overlaid with a thin layer of c... | 12/25/1979 |
| 4150912 | Twin blade mounting and tensioning apparatus A twin blade mounting and tensioning apparatus is disclosed wherein twin inside diameter cutting blades for sawing crystalline rod materials are mounted with annular clamping-tensioning members which clamp the twin blades between the members with the clam... | 04/24/1979 |
| 4067311 | Method for sawing hard material A method for sawing hard material with circular abrasive disc saws of the kind having secured to the periphery of the disc arcuated cutting segments of bonded diamond abrasives, in which conventional speed of rotation of the abrasive disc, cutting depth o... | 01/10/1978 |
| 4041650 | Material removal tool with multiple cutting edges A rotatable or reciprocable material removing tool having multiple cutting edges in which a plurality of cutting elements project from an outer surface of a base member of the tool and in which each cutting element comprises a cutting member composed of a... | 08/16/1977 |
| 3990338 | Laminated saw blade The present invention relates to a method in the production of rotatable tools, such as saw blades or similar, comprising at least two preferably metallic discs interconnected by means of glue, solder or any other binding means or adhesive wherein spacing... | 11/09/1976 |