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| Number | Title | Issue Date |
| 4871219 | Wide spectral band infrared refractive lens The disclosure relates to a wide spectral band objective refractive apochromatic lens system capable of operation with infrared light in the 3 to 12 micron range with good color correction simultaneously. The lens system includes three lenses, the first l... | 10/03/1989 |
| 4871231 | Three dimensional color display and system The disclosure relates to a three dimensional color display wherein controlled modulated laser light of predetermined different frequencies is transmitted via fiber optics and combined in a fiber optic coupler to provide a combined light beam. This light ... | 10/03/1989 |
| 4870474 | Lead frame A lead frame composed of an outer frame and inner lead frame portions formed as an integral frame wherein each lead frame portion directly joins the outer frame at some of the four corners of the lead frame portion with circuitous bridges interposed for f... | 09/26/1989 |
| 4870598 | Comprehensive logic circuit layout system Random logic circuitry (210) is laid out in a logic array (212) that has a plurality of row and column locations. The logic circuitry (210) implements a plurality of dynamic logic circuits, each logic circuit having a plurality of logic gate field effect ... | 09/26/1989 |
| 4870249 | Electric fuel heating device A fuel heating device comprises an electroconductive inner tube which forms a passageway for fuel to be heated. A heater having a positive coefficient of resistance (PTC) is fixed to the side of the outside surface of this electroconductive inner tube, a ... | 09/26/1989 |
| 4870373 | Constant phase gain control circuit The disclosure relates to a dual gate FET used in variable power amplifiers wherein a gain control circuit is provided across the dual gate electrodes whereby the voltage on one of the gate electrodes is a function of the voltage on the other gate electro... | 09/26/1989 |
| 4870346 | Distributed pseudo random sequence control with universal polynomial function generator for LSI/VLSI test systems Simple polynomial function generators are used to generate pseudo random test patterns and perform signature analysis on a per pin basis in the control logic in LSI/VLSI test systems.... | 09/26/1989 |
| 4870376 | Monolithic elastic convolver output circuit The disclosure relates to a microstrip circuit which is used to combine the energy output from the convolving plate of a surface acoustic wave (SAW) monolithic elastic convolver. The convolving plate is tapped at its two ends and a Wilkinson combiner is u... | 09/26/1989 |
| 4868741 | Computer bus deadlock prevention A digital computing system includes at least a first and a second bus with at least a first master connected to the first bus and a second master connected to the second bus. The first master is capable of requesting the second bus through the first bus a... | 09/19/1989 |
| 4868635 | Lead frame for integrated circuit An integrated circuit lead frame is configured so that it may be die stamped to cut lead frame leads to customize it for a particular semiconductor device bar size. Lead frame leads are cut at a specified distance from the lead frame bar pad so that a sem... | 09/19/1989 |
| 4868823 | High speed concurrent testing of dynamic read/write memory array A semiconductor read/write memory device has a normal mode of operation and a test mode. The test mode allows concurrent writing to a number of cells in the cell array so that test patterns may be rapidly loaded. The cell array is split into subarrays and... | 09/19/1989 |
| 4868871 | Nonparametric imaging tracker A nonparametric imaging tracker is disclosed that first declares (10) a reference subimage comprising a plurality of image pixels, each pixel having a numerical light intensity level. The tracker then finds (12) a reference distribution of intensity level... | 09/19/1989 |
| 4868765 | Porthole window system for computer displays A porthole window system for computer displays allows a user to look at a portion of a window which could otherwise not be seen. A porthole window acts as an opening in a window of the usual type through which underlying windows may be seen. A porthole wi... | 09/19/1989 |
| 4868633 | Selective epitaxy devices and method Selective growth of GaAs and related semiconductors (34) by use of tungsten silicide and related materials for growth masks (36) plus devices incorporating the selective growth plus use of the growth masks as electrical contacts are disclosed. The deposit... | 09/19/1989 |
| 4868631 | Bipolar transistor with shallow junctions and capable of high packing density A method of making a bipolar transistor in an LSI or VLSI process which includes forming a buried DUF collector of a first conductivity type, growing an epitaxial layer of a first conductivity type over said DUF collector and forming isolation means aroun... | 09/19/1989 |
| 4867841 | Method for etch of polysilicon film A process for etch of polysilicon films which utilizes the combination of remote and in situ plasma in a low pressure process module and the plasma is generated from a mixture of Helium and a source of Fluorine with the process chamber within the process ... | 09/19/1989 |
| 4868755 | Expert vehicle control system An automatic control system for an aircraft has a first controller connected to the pilot's operating controls. The first controller manipulates the operating controls so that goals, expressed in terms of selected aircraft parameters, are achieved. A seco... | 09/19/1989 |
| 4866674 | Bitline pull-up circuit for a BiCMOS read/write memory A BiCMOS static random access memory (SRAM) device is disclosed. The SRAM has an individual sense amplifier for each column therein, with bipolar pull-up transistors at the end of the bit lines opposite the sense amplifier. A pull-up control circuit which... | 09/12/1989 |
| 4866559 | Solid state circuit protector A protective circuit capable of remotely switching power to a load on and off and including an electrothermal sensor system having a heating element of predetermined resistance in series with the load and source of power whereby the temperature of the hea... | 09/12/1989 |
| 4866488 | Ballistic transport filter and device An energy filter for carriers in semiconductor devices and devices with such filters are disclosed. The filter is a superlattice and the filtering action arises from the subbands and gaps in the conduction and valence bands of the superlattice. A heteroju... | 09/12/1989 |
| 4866408 | Multiphase motor protector apparatus A three phase hermetic protector for electrical apparatus has a pair of terminals extending through a header with first and second elongated heaters mounted on the terminals and extending away from the header. A rigid support is attached to the header bet... | 09/12/1989 |
| 4866402 | System to verify phase lock of a phase lock loop Apparatus and method for verifying the lock state or lock condition of a phase locked loop that includes a phase detector, a loop filter and a voltage controlled oscillator. The apparatus comprises a second oscillator that provides a signal of predetermin... | 09/12/1989 |
| 4866365 | Supplemental automotive vehicular heater system and method of providing same A supplementary heating system particularly suitable for an automotive vehicle comprises a step down transformer coupled to the stator windings of the vehicle's alternator and a positive temperature coefficient (PTC) of resistivity heater electrically con... | 09/12/1989 |
| 4866008 | Methods for forming self-aligned conductive pillars on interconnects Methods, of forming a self-aligned conductive pillar (16) on an interconnect (12) on a body (10) having semiconducting surfaces. A first mask (24) defines an inverse pattern for formation of an interconnect (12). The interconnect (12) is formed by additiv... | 09/12/1989 |
| 4865654 | Delayed reflow alloy mix solder paste A solder paste mixture for soldering surface mount devices to a circuit board using a reflow soldering process which utilize a vapor phase furnace. The solder paste mixture has a metallic content which is 63% tin and 37% lead. The metallic content of the ... | 09/12/1989 |
| 4865250 | Automotive oil level control valve apparatus A fluid level control valve has a base with an aperture formed therein. A cover is slidingly disposed over the aperture and is biased by a thermostatic element in a direction tending to close the aperture. The thermostatic element is an elongated strip ha... | 09/12/1989 |
| 4866678 | Dual-port memory having pipelined serial output A dual-port memory which features a pipelined serial port is disclosed. The serial side of the dual-port memory contains a ripple counter which is broken between predetermined stages. The contents of the stages above the break are decoded to select a grou... | 09/12/1989 |
| 4864628 | Method of optical character recognition A method for recognizing and providing an output corresponding to a character is disclosed. The character is received by an imager, digitized and transmitted to a buffer memory. Data in the buffer memory is read in a sequence which circumnavigates the tes... | 09/05/1989 |
| 4864543 | First-in, first-out memory with counter address pointers for generating multiple memory status flags A first-in, first-out memory has a write pointer (34) that includes a higher-order ring counter (192) and a lower-order ring counter (190). Ring counters (190, 192) store respective higher-order and lower-order address digits that are together used to sel... | 09/05/1989 |
| 4864375 | Dram cell and method The following detailed description describes a dynamic random access memory (dRAM) cell. The described cell provides a one-transistor/one-capacitor dRAM cell structure and array in which the cell pass transistor is formed on the sidewalls of a trench cont... | 09/05/1989 |
| 4864374 | Two-transistor dram cell with high alpha particle immunity A DRAM cell (8) having a storage node (18), a pass transistor (76) and a polysilicon word line (84) formed within an oxide isolated trench (68), thereby providing high soft error immunity. A write bit line (66) functions as the drain region (78) of the pa... | 09/05/1989 |
| 4864103 | Canister cover heater for automotive vapor canister A cover for an automotive vapor canister has a heat-spreading member heated by a self-regulating electrical resistance heater of positive temperature coefficient of resistivity for heating air which is periodically introduced into the canister for purging... | 09/05/1989 |
| 4864102 | Miniature adjustable thermostat with integral over-temperature protection A thermally responsive control especially for a clothes iron combines an adjustable, temperature-regulating thermostat and an over-temperature control for limiting maximum temperature levels on a plastic mounting bracket where the over-temperature control... | 09/05/1989 |
| 4863878 | Method of making silicon on insalator material using oxygen implantation The described embodiments of the present invention provide a semiconductor on insulator structure providing a semiconductor layer less susceptible to single event upset errors (SEU) due to radiation. The semiconductor layer is formed by implanting ions wh... | 09/05/1989 |
| 4863559 | Method for forming local interconnects using chlorine bearing agents A method for etching titanium nitride local interconnects is disclosed. A layer of titanium nitride is formed as a by-product of the formation of titanium silicide by direct reaction; this layer of titanium nitride is present over the titanium silicide la... | 09/05/1989 |
| 4863558 | Method for etching tungsten Tungsten is rapidly and anisotropically etched under plasma bombardment conditions by using a feed gas mixture which includes a fluorine source (such as SF6) plus a bromine source (such as HBr), plus a hydrocarbon source (e.g., an alkyl, such a... | 09/05/1989 |
| 4863561 | Method and apparatus for cleaning integrated circuit wafers The described embodiment of the present invention provides a method and device for cleaning the surface of a silicon wafer using dry gases. At least one of the gases provided is excited by passing the gas through a microwave plasma generator or by heating... | 09/05/1989 |
| 4862421 | Sensing and decoding scheme for a BiCMOS read/write memory A BiCMOS static random access memory (SRAM) is disclosed, which has first and second stage sense amplifiers. Each column in the memory array is associated with a first stage sense amplifier, and the first stage sense amplifiers are arranged in groups, wit... | 08/29/1989 |
| 4862373 | Method for providing a collision free path in a three-dimensional space A method for providing a collision free safe path includes storing predetermined spatial graphs representing the set of points defining the collision free paths within that region and calculating the shortest path over the region. Each of the points in th... | 08/29/1989 |
| 4862306 | Combination motor protector and starter apparatus A motor protector and starter particularly suited for refrigeration compressor motors are mounted in the recess of a first housing portion with their resilient female sockets disposed in alignment with a pin receiving aperture. Leads are attached to termi... | 08/29/1989 |
