Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 7357052 | Zirconia based blades and foils for razors and a method for producing same Stabilized or partially stabilized zirconia paste may be screen printed onto hydrophilic plastic film in the form of a mesh. On firing, this becomes a very sharp foil for electric razors with excellent wear and flexibility characteristics. Stabilized or partially st... | 04/15/2008 |
| 7353606 | Hair cutting and styling razor A razor cutter for hair using a blade having one or two accordion shaped cutting edges to allow a feathered cut of hair strands at different points when the cutting edge of the blade contacts hair. Each cutting edge is made up of a plurality of smaller edge sections... | 04/08/2008 |
| 7243428 | Hair brush and replaceable cutting unit for hair brush The object of the present invention is to provide a hair brush that can be used for cutting the hair so that no skills and knack are required for adjusting the inclination angle of bristles and cutters with respect to the scalp. In a hair brush in which multiple the... | 07/17/2007 |
| 7204180 | Apparatus for cutting plastic profiles An apparatus for cutting plastic profiles includes a knife which is guided transversally to the profile, the knife including a cutting section and a holding section, the cutting section defining a guide portion, a transition portion, and a blade portion defining a t... | 04/17/2007 |
| 7060367 | Cutting blade and method of producing the same A blade with improved sharpness and durability is disclosed. The blade includes a base plate having an edge and a coating layer for coating the edge. The coating layer is formed of a material handling metal, and a tip of the coating layer is sharpened. It is preferr... | 06/13/2006 |
| 6966116 | Shaving head for a hair cutting apparatus The invention is directed to a shaving head for a hair cutting apparatus, with at least one outer cutter and at least one under cutter associated therewith and having cutting edges, said cutters being movable relative to one another by a drive mechanism, with the ou... | 11/22/2005 |
| 6962000 | Cutting member with dual profile tip The invention relates to a cutting member (7) includes a plate-shaped substrate (19) on which a tip (27) is provided which is bounded by a cutting edge (9). According to the invention, the tip includes an ultimate tip (31) and a ba... | 11/08/2005 |
| 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 |
| 6848185 | Utility knife A utility knife including: a body defining an interior cavity, and a blade carriage slidably disposed within the cavity. The blade carriage is configured for removably receiving at least one blade, and is at least partially slidably removable from the cavity, thereb... | 02/01/2005 |
| 6804886 | Safety razors A safety razor blade unit (2) has blade assembly (5) comprising a plurality of parallel blades (16) mounted on a razor handle (1) by a flexible support structure (4). Each blade (16) consists of an elongate blade element hav... | 10/19/2004 |
| 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 |
| 6176014 | Safety razors A novel cutting element in or for a safety razor comprises an elongate member with a series of slots (5), each slot (5) tapering from an open forward end to a substantially closed trailing end, and each slot (5) being confined between a pair of shaped edg... | 01/23/2001 |
| 6032372 | Intrinsically fenced safety razor head The various embodiments of the invention are directed to safety razor heads (1) having an intrinsically fenced unitary blade (7) oriented at a high slicing angle to the shaving direction. The unitary blade comprises a plurality of short blade edges (22) i... | 03/07/2000 |
| 5802720 | Shaving cloth A razor consisting of a flexible cloth-like base material upon which are mounted a plurality of cutting heads. Each head is attached to the base material so as to be flexible in orientation. A preferred head embodiment includes a flat metal structure havi... | 09/08/1998 |
| 5795648 | Method for preserving precision edges using diamond-like nanocomposite film coatings A method for preserving the precision-edges of a precision-edged substrate by applying to a the substrate a corrosion resistant coating comprising a diamond-like solid state material having interpenetrating atomic scale networks comprising a first diamond... | 08/18/1998 |
| 5669144 | Razor blade technology A razor blade includes a substrate with a wedge-shaped edge at a distance of forty micrometers from the sharpened tip, and a layer of diamond or diamond-like material defined by facets that have an included angle of less than seventeen degrees that has a ... | 09/23/1997 |
| 5497550 | Shaving system A shaving system with a blade member with a cutting edge of wedge shape that is defined by main facets with an included facet angle in the range of 10°-17° in the region forty micrometers from the cutting edge. The blade is mounted between leading and t... | 03/12/1996 |
| 5490329 | Shaving system A shaving system of the wet shave type includes support structure and blade structure secured to the support structure. The blade structure has an aperture with an annular sharpened shaving edge that is defined by main facet portions that converge at an a... | 02/13/1996 |
| 5488774 | Cutting edges An improved cutting instrument including a wedge-shaped cutting edge such as a razor blade having in the region of its ultimate edge an adherent low friction coating of diamond or a diamondlike carbon.... | 02/06/1996 |
| 5295305 | Razor blade technology A razor blade includes a substrate with a wedge-shaped edge, an interlayer of material selected from the group consisting of silicon, silicon carbide, vanadium, tantalum, nickel, niobium, and niobium-molybdenum alloy and alloys of such materials on the ti... | 03/22/1994 |
| 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 |
| 4977670 | Shaving implement The shaving implement comprises a housing having a plurality of apertures through a shaving surface, each aperture containing a razor assemblage. Each assemblage includes a soap bar guard and a razor blade connected to one another and mounted for angular ... | 12/18/1990 |
| 4942662 | Adjustable arcuate razor head The safety razor has an axial control rod that may have three detenting positions in the handle to define the movement up or down of the rod which arcuately bends at least one razor blade and a razor blade support plate in which the razor blade or blades ... | 07/24/1990 |
| 4916817 | Razor blade cutting edge structure Novel methods and apparatus for providing a facet on opposed surfaces of a cutting instrument such as a razor blade or the like. Essentially, the methods and apparatus are designed to initially abrade opposed surface portions of the instrument concurrentl... | 04/17/1990 |
| 4912846 | Disposable razor A safety razor blade has a blade body with a substantially planar upper surface. A row of blunt convex protrusions are spaced along the forward edge portion of the blade body in a comb-like configuration. The protrusions have upper surfaces substantially ... | 04/03/1990 |
| 4887356 | Hair sculpturing razor Razors for care of hair are improved by providing the razor with a cutting edge having a series of uniformly spaced imperfections or dents extending across said cutting edge, the dents dulling from 20 to 75 percent of the normal cutting edge of the razor.... | 12/19/1989 |
| 4720918 | Razor blades A razor blade edge tip has a cross-sectional shape defined, over up to 40 μm from the extreme edge by the equation w=adn, in which w is the tip chord thickness in μm at a distance d from the extreme edge; a is factor of proportionality not gr... | 01/26/1988 |
| 4589205 | Inner cutter for electric shavers An inner cutter for electric shavers is disclosed. The inner cutter comprises a plurality of inner blades mounted on a base member to be driven to move in sliding engagement with an outer shearing plate having a number of perforations therein. Each inner ... | 05/20/1986 |
| 4211006 | Guarded razor blade A razor blade having guard elements deposited in recessed guard seats formed in the cutting edge and flanking surfaces of the blade. The guard elements may be deposited by electrochemical plating and their retention on the blade is enhanced by the recesse... | 07/08/1980 |
