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Patent # Description
US-4,918,262 Touch sensing display screen signal processing apparatus and method
A touch sensing display apparatus having improved electrical signal processing is described. A plurality of signal threshold comparison levels are employed by...
US-4,910,574 Porous circuit macro for semiconductor integrated circuits
A circuit macro is provided for a VLSI circuit device having a semiconductor substrate and M1 and M2 metal layers defining a grid of M1 and M2 conductive lines...
US-4,899,384 Table controlled dynamic bit allocation in a variable rate sub-band speech coder
A sub-band coder utilizes one or more bit allocation tables to dynamically distribute the channel bit capacity bandwidth among the frequency bands according to...
US-4,892,487 Connector assembly with movable carriage
An electrical connector assembly including a housing, a flexible circuit located within the housing and including first and second terminals thereon, a carriage...
US-4,881,230 Expert system for processing errors in a multiplex communications system
A method and apparatus for detecting and analyzing errors in a communications system is described. The method employs expert system techniques to isolate...
US-4,879,745 Half-duplex speakerphone
A half-duplex digital speakerphone includes a control state machine which controls the selection of either a transmit or a receive audio path based upon a...
US-4,873,687 Failing resource manager in a multiplex communication system
A method and apparatus for detecting and analyzing errors in a communications system is described. The method employs expert system techniques to isolate...
US-4,869,777 Method for selectively etching the materials of a composite of two materials
A method of etching in an O.sub.2 microwave plasma is provided which has a predetermined selectivity between a composite of two materials such as a photoresist...
US-4,868,863 Apparatus for connecting data processing equipment to a communication network
Apparatus for connecting data processing equipment to a communications network includes hardware for a range of different communications standards. Also included...
US-4,866,769 Hardware assist for protecting PC software
The copy protection of personal computer (PC) software distributed on diskettes is assisted by providing a unique identification (ID) stored in read only memory...
US-4,864,458 Electrostatic discharge grounding switch and method of operating same
A switching device on a printed circuit card assembly is provided which permits the signal ground of the printed circuit card to be grounded to the machine...
US-4,862,318 Method of forming thin film terminations of low inductance ceramic capacitors and resultant article
An improved method for forming shorting bars on ceramic capacitors of the tab type includes the step of effecting a final polishing of the tab exposed surface...
US-4,860,351 Tamper-resistant packaging for protection of information stored in electronic circuitry
A tamper-resistant package for protection of information stored in electronic circuitry includes apparatus for distributing electro-magnetic energy within a...
US-4,860,248 Pixel slice processor with frame buffers grouped according to pixel bit width
A pixel processor includes a plurality of pixel slice processors and the architecture is arranged so that the pixel length is extendible by merely increasing the...
US-4,853,081 Process for removing contaminant
Contaminant is removed from the interior of the holes in the vicinity of preselected locations by etching in a gaseous plasma wherein the sheath voltage is...
US-4,849,802 Thermally stable low resistance contact
In a semiconductor device, a contact with low resistance to a III-V compound semiconductor substrate was fabricated using refractory materials and small amounts...
US-4,847,893 Method for monitoring telephone status changes
A method is disclosed for controlling the monitoring of telephone status changes by an associated processor. A status change inquiry message is transmitted from...
US-4,846,929 Wet etching of thermally or chemically cured polyimide
Polyimide is etched by contacting the polyimide with an aqueous solution of a metal hydroxide followed by contact with an acid followed by contact with an...
US-4,841,453 Multidirectional scan and print capability
A character generator with multidirectional scan and variable line and character (or symbol) size capability. Universality is implemented by producing a serial...
US-4,839,857 System for facilitating the control of audio information within a word processing document with audio input
A word processing system in which text can be displayed on a display device and audio recording and playback means is provided to permit a user to record an...
US-4,830,723 Method of encapsulating conductors
A method of forming successive metal layers of varying widths on a substrate is disclosed. A mask having a through going aperture is provided, the mask including...
US-4,823,281 Color graphic processor for performing logical operations
A color graphic processor includes one or more processing elements responsive to pixel data provided by a frame buffer. The processing element stores pixels from...
US-4,819,038 TFT array for liquid crystal displays allowing in-process testing
An array of thin film transistor (TFT) devices is provided with a conductive region, such as a strip, for temporarily coupling a floating pel eletrode of each of...
US-4,811,206 Data processing system with overlapped address translation and address computation
A method of operating a data processing system using virtual memory in which virtual memory addresses are formed by a base register value and a displacement...
US-4,803,651 Method for encoding and decoding acyclic, linked-list data structures for efficient storage, retrieval and...
To encode hierarchial information the invention recognizes that there is implicit information which must be made explicit. Thus the hierarchial information is...
US-4,799,990 Method of self-aligning a trench isolation structure to an implanted well region
A method for self-aligning an isolation structure to a diffusion region. A first masking layer is formed on a semiconductor substrate, the first masking layer...
US-4,798,430 Lightwave guide connector with release levers
A connector for lightwave guides with release levers attached at the narrow sides thereof, which, when lateral pressure is applied, actuate detents. ...
US-4,794,389 Attribute hierarchy system
Attribute hierarchy system including hardware assisted by software for utilizing a stack structure of a multiple-level stack and a plurality of stacks for...
US-4,793,895 In situ conductivity monitoring technique for chemical/mechanical planarization endpoint detection
An apparatus and method for monitoring the conductivity of a semiconductor wafer during the course of a polishing process. A polishing pad that contacts the...
US-4,792,204 Process and apparatus for elimination of tolerance dependent variations of a selectable spacing between...
A process and a device for substantially eliminating tolerance-dependent variations of a preselectable space between the components of an optical communication...
US-4,791,629 Communications switching system
A communication switching system in which control functions are distributed homogeneously, as opposed to being distributed by individual function, throughout the...
US-4,788,683 Data processing system emulation with microprocessor in place
Apparatus is provided for testing a data processing system which includes a microprocessor, the testing occurring with the microprocessor in place in the system....
US-4,782,193 Polygonal wiring for improved package performance
A connection arrangement includes a plurality of sets of wiring planes, wherein any connection uses one and only one set of the planes. Each plane is a principal...
US-4,773,036 Diskette drive and media type determination
Diskette media and drive determination in which a diskette controller attempts to read the diskette according to a variety of formats having, for instance,...
US-4,772,931 Interdigitated Schottky barrier photodetector
A semiconductor photodetector is formed of interdigitated, metal-semiconductor-metal electrodes disposed on a surface of semi-insulating semiconductor material,...
US-4,764,984 Fluorescent sensors for infrared free-space links in data communication systems
A fluorescent activated light detector for detection of time modulated IR signals of preselected wavelength includes an IR light collecting member made of a...
US-4,762,994 Compact optical scanner driven by a resonant galvanometer
A compact optical scanner includes a base unit and a scan unit. The base unit includes an optical source such as a laser and an optical path directing a beam...
US-4,754,433 Dynamic ram having multiplexed twin I/O line pairs
A dynamic random access memory (DRAM) is comprised of a first and a second input/output (I/O) bus, a first and a second I/O sense amplifier, and a first and a...
US-4,740,956 Linear-space signalling for a circuit-switched network
A circuit-switched local area network relies on a star topology for data transfer. Signalling information is confined to a single common signalling link or...
US-4,727,304 Phase sequencer for stepping motor
By examining parity for a bit combination representing the present phase state of a stepping motor, a selection can be made as to which phase state should be...
US-4,722,653 Material handling for automated assembly facility
An automated assembly facility includes a random storage facility for each assembly line conveyor and associated series of assembly stations. The assembly line...
US-4,715,674 Light-wave guide-plug connection
Adjacent lying plug-connector halves, the front ends of which exhibit pin or sleeve shaped plug elements, are provided with first and second supporting bodies,...
US-4,714,504 Process of laminating a photosensitive layer of a substrate
A process for laminating discrete sections of a supported photosensitive layer onto a continuing series of sheet substrates. Each substrate is advanced to and...
US-4,714,400 Plural robotic drive
A robotic system includes two joints moving a common load-bearing member along a path for positioning a load. Each joint includes a linear electric motor and a...
US-4,710,769 Transmit-secure non-blocking circuit-switched local area network
A switching system or local area network is non-blocking, transmit-secure and employs a star type topology. A back plane uses n(n-1) bus lines to interconnect n...
US-4,706,008 Self-adjusting homing for a stepping motor
For step motors positioned in response to an external reference location, correction for potential one step misalignment is provided. The method and the...
US-4,697,923 Method for visual inspection of multilayer printed circuit boards
A method is disclosed for the visual inspection of electrical circuitry deposited in the layers of a multilayer printed circuit board wherein the dielectric...
US-4,697,142 Printed circuit conductor test system
A system for testing conductor lines in a printed circuit board includes circuitry for the burning out of constricted regions of the printed circuit lines so as...
US-4,696,426 Document reading envelope depository
A banking machine having a single opening for both envelope and individual check or note deposit is disclosed. The entrance to the depository has a deposit item...
US-4,692,877 Digital timing control system with memory look ahead
A pel timing clock compensates for the non-linear displacement profile of a resonant galvanometerscanner. A pel time counter is loaded with a count value and...
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