Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 7194809 | Quick release blade and knife A knife blade having a cutting edge with a first end and a mounting edge opposite the cutting edge. Typically the first end will be a point, but other configurations are possible. In addition, the knife blade has a first attachment slot extending from the mounting e... | 03/27/2007 |
| 7191522 | Cutting blade and cutting blade assembly for electric shaver In a cutting blade assembly for an electric foil shaver, a first cutting blade of the assembly has a generally planar first face, a generally planar second face opposite the first face, and a peripheral cutting edge. The first cutting blade has at least one bump dis... | 03/20/2007 |
| 6957598 | Razor blade and method of manufacture An elongated stock material for use in manufacturing shaving razor blades, the material including an elongated, flat strip of metal having a front edge and back edge extending along its length, a sharpened cutting edge portion extending along the front edge, a weake... | 10/25/2005 |
| 6823593 | Serrated cutting blade An improved serrated cutting blade is characterized by the shape and positioning of the sharpened teeth of the cutting edge. In preferred embodiments the blade may be used in combination with a handle or holder such as that typically referred to as a utility knife o... | 11/30/2004 |
| 6629475 | Razor blade An elongated stock material for use in manufacturing shaving razor blades, the material including an elongated, flat strip of metal having a front edge and back edge extending along its length, a sharpened cutting edge portion extending along the front ed... | 10/07/2003 |
| 5848475 | Razor and blade The invention provides a razor having a retaining mechanism adapted to receive a blade longer than the mechanism for retaining the blade so that one or both wings of the blade extend past the retaining mechanism to provide a small straight razor. Addition... | 12/15/1998 |
| 5727320 | Utility knife with blade magazine A utility knife has a blade magazine removably mounted in a manually holdable housing and rotatable about an axis parallel to a longitudinal axis of the housing. The blade magazine has a series of radially and longitudinally extending circumferentially sp... | 03/17/1998 |
| 5715606 | Razor blade Razor blades for use in shavers and especially in cartridge type razor blade units. Opposite the cutting edge of an essentially rectangular blade, and integral with this blade, there are provided one or more springy, resilient protrusions, in the plane of... | 02/10/1998 |
| 5551153 | Razor blade assembly A twin-blade assembly is formed from two blade steel members (A, B) shaped to have rear mounting legs (3A/B), spring arms (9A, 9B) at opposite ends of the unit, downturned legs (2A, 2B) for reinforcing the members and sharpened blade edges (1A, 1B) on bla... | 09/03/1996 |
| 5517760 | Movable blade shaving cartridge or the like A spacer for maintaining separation between a first and a second blade in a razor blade cartridge, both the first and second blades having a forward cutting edge. The spacer includes a member forming an upper and lower surface having a plurality of holes ... | 05/21/1996 |
| 5103564 | Sectioned cutting blade A cutting blade for use in cutting tools such as a carpet trimming device of hand knives is disclosed of the trapezoidal contour where the major base portion is the cutting edge and the blade is provided with a row of preferably three openings for a clamp... | 04/14/1992 |
| 5088195 | Shaving system A shaving system that includes a holder and a blade member secured to the holder. The blade member has an aperture that defines an annular sharpened edge with main facet portions that converge at an angle of less than 30° and supplemental facet portions ... | 02/18/1992 |
| 4729168 | Two-edged multi-purpose artistic technical knife An artistic technical knife which has a double-edged blade having a sharpened point at its terminus and a number of frangible recesses extending at oblique angles from one edge of the blade to the opposite side of the blade to divide the blade into a numb... | 03/08/1988 |
| 4552832 | Shear foil having protrusions on its skin-contacting surface thereof A method for producing a shear element having protrusions on the skin contacting surface thereof, including the steps of coating an electrically conductive surface with a photoresist, exposing the photoresist to a hold pattern and developing the photoresi... | 11/12/1985 |
| 4483068 | Razors, razor blades and razor blade dispensers The invention provides the combination of a razor blade 10 and holder 12 for the razor blade, wherein the cutting edges of the blade are constituted by the periphery of a number of holes 10b in the blade, and the holder is provided with means 13 by which ... | 11/20/1984 |
| 3997969 | Electric dry shaver An electric dry shaver is disclosed having an improved outer cutter which is rotatably repositionable or readily demountable by the user for cleaning hair debris from a hair chamber of the shaver.... | 12/21/1976 |
