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| Number | Title | Issue Date |
| 4961621 | Optical parallel-to-serial converter An optical parallel-to-serial converter constructed from at least two optical shift registers coupled in cascade by an optical two-to-one combiner. The input port of the first optical shift register serves as one input to the parallel-to-serial converter,... | 10/09/1990 |
| 4757233 | Efficient UV-emitting phosphors based on cerium-activated calcium pyrophosphate and lamps containing the same The present invention is directed to phosphors exhibiting efficient, narrow band UV emission, with peak emission at 330 nm (from excitation at 254). These phosphors are cerium-activated calcium pyrophosphate (beta-phase) of nominal formulation wherein: NS... | 07/12/1988 |
| 4749629 | Ultrathin laminated oxide coatings and methods A wear resistant article, such as a cutting tool. A hard ceramic or cemented carbide substrate is coated with a laminated oxide coating about 0.3-20 microns thick, having at least three ultrathin layers. Each layer is an oxide layer about 0.1-3 microns th... | 06/07/1988 |
| 4710425 | Abrasion resistant articles and composition utilizing a boron-doped refractory particle This invention relates to abrasion resistant materials and to articles of manufacture made therefrom. More particularly, it is concerned with abrasion resistant materials comprising boron doped TiC or boron doped VC distributed in a matrix containing sili... | 12/01/1987 |
| 4680509 | Method and apparatus for starting high intensity discharge lamps A light source including a spiral line pulse generator having an output coupled to one electrode of a high pressure discharge lamp and having an input for coupling to a source of lamp operating power for providing high voltage lamp starting pulses. The pu... | 07/14/1987 |
| 4671613 | Optical beam splitter prism An improved geometry for an optical beam splitter prism permits all input and output beams to be parallel and to remain parallel while the prism is misaligned. It is particularly useful in conjunction with fiber optic couplers and is applicable to splitti... | 06/09/1987 |
| 4648089 | Digital voice summing for teleconferencing Digitally encoded voice signals are weighted dynamically in multipliers prior to summation of the digital signals. Greater weight is given to the more active channels. In one system, the signals are weighted proportionately to the square of the amplitude ... | 03/03/1987 |
| 4510076 | Electrically conductive polymer blends of an acetylene polymer and a triblock thermoplastic elastomer Electrically conductive polymer blends of an acetylene polymer, such as poly(acetylene), and a triblock thermoplastic elastomer, such as styrene-butadiene-styrene, are disclosed. In addition, a method for preparing such blends wherein the acetylene polyme... | 04/09/1985 |
| 4510075 | Electrically conductive blends of an acetylene polymer and an elastomer having low unsaturation Electrically conductive polymer blends of an acetylene polymer and an elastomer having a low level of unsaturation are disclosed herein. The low level of unsaturation provides resistance to heat, light, oxygen and ozone and yet provides sufficient sites f... | 04/09/1985 |
| 4510016 | Method of fabricating submicron silicon structures such as permeable base transistors Submicron silicon structures are fabricated by repeat oxidation and stripping the walls of a U-groove leaving thin silicon fingers. This method may be used to fabricate a silicon transistor having an emitter and a collector separated by a channel. The channel ... | 04/09/1985 |
| 4488609 | Mining drill In a mine tool of the type having a drive body holding a bit, the bit includes forwardly projecting support lands holding a cutting insert wherein the lands have a maximum dimension as measured in a direction perpendicular to a respective side surface of ... | 12/18/1984 |
| 4476622 | Recessed gate static induction transistor fabrication A gate-source structure and fabrication method for a static induction transistor having improved gain and frequency characteristics and having relatively simple fabrication requirements. The method and the device are embodied by gate regions diffused into... | 10/16/1984 |
| 4433739 | Mining drill In a mine tool having a drive body, an insert is detachably held to the drive body in a slot formed by forwardly projecting flanges.... | 02/28/1984 |
| 4427082 | Mining drill In a mine tool of the type having a drive body holding a bit, the bit and drive body include complimentary and mating surfaces wherein one pair of surfaces are adapted to be in overlapping relationship when the bit is twisted in a direction opposite the r... | 01/24/1984 |
| 4427924 | Enhanced electrodeless light source A source of visible light including an electrodeless lamp containing a mercury halide, iodine, and nitrogen. When the contents of the electrodeless lamp are excited by high frequency power, visible light is emitted.... | 01/24/1984 |
| 4427923 | Electrodeless fluorescent light source An electrodeless fluorescent light source including an electrodeless lamp containing a metal iodide or iodine. A fluorescing material is disposed between the electrodeless lamp and an outer envelope. When the contents of the electrodeless lamp are excited... | 01/24/1984 |
| 4427922 | Electrodeless light source A source of visible light including an electrodeless lamp containing a mercury halide. When the contents of the electrodeless lamp are excited by high frequency power, excited mercury (I) halide molecules emit visible light.... | 01/24/1984 |
| 4427921 | Electrodeless ultraviolet light source A source of ultraviolet radiation including an electrodeless lamp containing a metal iodide or iodine. When the contents of the electrodeless lamp are excited by high frequency power, excited iodine atoms emit ultraviolet radiation.... | 01/24/1984 |
| 4426209 | Carbide coated composite modified silicon aluminum oxynitride cutting tools Coated abrasion resistant composite ceramic cutting tools comprise a composite substrate body consisting essentially of a particulate material selected from the group consisting of the refractory metal carbides, nitrides, carbonitrides and combinations th... | 01/17/1984 |
| 4306173 | Phosphor with extended fluorescence decay lifetime and lamp based thereon A luminescent phosphor composition having enhanced luminescent decay lifetime consists essentially of a non-stoichiometric tin and manganese coactivated alkaline earth orthophosphate represented by the formula where 0.001ࣘvࣘ0.05 0.180ࣘwࣘ0.35 0ࣘxࣘ0.... | 12/15/1981 |
| 4182028 | Hermetically sealed button-type electrochemical cell and method for making same An ultra-thin hermetically sealed button-type electrochemical cell is disclosed comprising a pair of mating metallic housing members, at least one of which is generally dish shaped to define an enclosed space therebetween. A peripheral opening defining a ... | 01/08/1980 |
| 4063132 | DC powered microwave discharge in an electrodeless light source A half wavelength resonant cavity having inner and outer coaxial conductors is coupled at one end to a dc power source, and a gas discharge electrodeless lamp is disposed in the region between the conductors at the other end of the cavity. Repetitive burs... | 12/13/1977 |
