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Patent # Description
US-4,681,424 Compensation for fine line prints
In an electrophotographic printer or the like, compensation is provided for environmental effects (temperature, humidity, photoconductor aging, etc.) which would...
US-4,680,524 Mechanism for positioning an output member
This invention relates to a mechanism for positioning an output member of a mechanical system and in particular a mechanical system that has backlash present....
US-4,676,426 Solder leveling technique
A method of solder leveling in printed circuit boards or other circuitized substrates. Flux is first applied to the surface of the substrate to be soldered....
US-4,675,650 Run-length limited code without DC level
Code modification circuitry alters the end portion of each block in a sequence of code blocks, and also inserts additional bits at the junction between...
US-4,673,987 Compressed block code for facsimile transmission
A coding process for a facsimile transmission system employs block coding and dither matrices of black and white picture elements, wherein each matrix represents...
US-4,670,325 Structure containing a layer consisting of a polyimide and an organic filled and method for producing such a...
A structure comprising on a substrate successive layers of metal circuitry having therebetween as a dielectric a cured polyimide composition containing a...
US-4,661,955 Extended error correction for package error correction codes
An extended error code particularly applicable to a code that can correct any number of errors in one sub-field but can only detect the existence of any number...
US-4,661,882 Power supply/sink for use with switched inductive loads
A power supply/sink for use with switched inductive loads includes a transformer with a first secondary winding for generating power supply current connected in...
US-4,659,425 Continuous process for the manufacture of printed circuit boards
A continuous method for the manufacture of a circuit board wherein a coating of a solvent-free thermosetting resin is applied to the surface of a metal foil. The...
US-4,642,618 Tool failure detector
A failure detector detects breakage in a machine tool cutting element, such as a drill bit, by use of a accelerometer supported against a workpiece being...
US-4,639,572 Laser cutting of composite materials
A method and apparatus for laser cutting sheet material and especially for laser cutting composite sheet material. An inert gas shield, preferably of nitrogen,...
US-4,631,670 Interrupt level sharing
An interrupt interface circuit for interrupt level sharing comprising a pulse generator having an open-collector or tri-state output connected to an external...
US-4,622,514 Multiple mode buckling beam probe assembly
A multiple mode buckling beam probe is formed by top and bottom mating locating guides interposed between a space transformer die bearing exposed wire contact...
US-4,622,205 Electromigration lifetime increase of lead base alloys
Electromigration activity is decreased and lifetime is extended in solder stripes employed as conductors and terminals on microelectronic devices by forming an...
US-4,622,095 Laser stimulated halogen gas etching of metal substrates
A method of radiation induced dry etching of a metallized (e.g. copper) substrate is disclosed wherein the substrate is pattern-wise exposed to a beam of laser...
US-4,615,011 Iterative method for establishing connections and resulting product
A method for establishing connections by automatically routing a plurality of paths between individual components using initially simple connection path shapes....
US-4,605,870 High speed low power current controlled gate circuit
The invention pertains to semiconductor circuitry, and more particularly to a class of circuitry known as current controlled gate circuits for driving very large...
US-4,599,558 Photovoltaic imaging for large area semiconductors
An imaging system for detecting recombination center defects in a semiconductor wafer in which an oxidized wafer is pre-treated by charging the oxide in a corona...
US-4,599,134 Plasma etching with tracer
A procedure for cleaning drilled holes in laminated workpieces such as printed electric circuit boards includes the steps of coating a cutting instrument, such...
US-D284,475 Image scanner
US-4,594,682 Vector processing
A cache memory, intermediate a CPU and a main memory, is employed to store vectors in a cache vector space. Three vector address operand registers are employed...
US-4,593,216 Rotary stepping motor having improved construction
An improved impulse-operated rotary stepping motor is constructed with a two-part stator assembly and coil support for each stage to reduce manufacturing costs,...
US-4,589,142 Method and apparatus for character recognition based upon the frequency of occurrence of said characters
A method and apparatus of processing data is disclosed for recognizing unknown characters of a known character set based in part upon the frequency of occurrence...
US-4,581,710 Method of editing dot pattern data for character and/or image representations
For the layout of a page, text and image blocks with data for positioning them on the page are supplied to the data processing system. The image blocks contain...
US-4,579,055 Printer having drive and control system for metal band holding print elements
A printer of the type including a platen, a bank of hammers extending in a straight line along and spaced from the platen and a continuous metal band of...
US-4,578,720 Self-clocking code demodulator with error detecting capability
A demodulator for reading a self-clocking frequency modulated code establishes time frames based on the reading process by which erroneous signal peaks can be...
US-4,578,711 Video data signal digitization and correction system
An analog video data signal digitization and correction system scans a medium to produce video data signals representing images printed on the medium. Two...
US-4,575,630 Electron-beam testing of semiconductor wafers
A method for examining non-metallized semiconductor wafers without the use of any electrical or mechanical contact therewith is provided by the scanning of the...
US-4,566,050 Skew insensitive magnetic read head
In hand-held magnetic readers, it is desirable that the magnetic read head be able to detect flux transitions on the surface of a magnetic media without...
US-4,566,019 Method of driving electrodes in an electroerosion printer
The invention concerns a method and a circuit arrangement for electrically driving print electrodes in an electroerosion printer by means of driver stages...
US-4,564,584 Photoresist lift-off process for fabricating semiconductor devices
A method making self-aligned semiconductors utilizing two resist masking steps to form a device; making one of the masks insoluable with respect to the other so...
US-4,562,594 Method and apparatus for segmenting character images
A method and apparatus are disclosed for segmenting character images in an optical image system where the character images have a predetermined pitch. The...
US-4,561,040 Cooling system for VLSI circuit chips
A system for cooling integrated circuit chips and particularly those involving very large scale integrated circuits; the system provides for closely associating...
US-4,542,453 Program patching in microcomputer
A single-chip microcomputer device contains on-chip program storage in a read-only memory (ROM), and this program may be corrected or updated by patching. The...
US-4,542,340 Testing method and structure for leakage current characterization in the manufacture of dynamic RAM cells
A testing method and structure for leakage current characterization in the manufacture of dynamic RAM cells; the testing structure includes two large ...
US-4,534,826 Trench etch process for dielectric isolation
A process for etching deep trenches to achieve dielectric isolation for integrated circuit devices; the process insures obtaining substantially perfectly...
US-4,529,894 Means for enhancing logic circuit performance
Disclosed is a means for enhancing logic circuit performance and more particularly, for enhancing the switching speeds of a variety of logic circuits. What is...
US-4,528,066 Selective anisotropic reactive ion etching process for polysilicide composite structures
A reactive ion etching technique is disclosed for etching a gate electrode out of layers of tungsten silicide and polycrystalline silicon without etching the...
US-4,525,640 High performance and gate having an "natural" or zero threshold transistor for providing a faster rise time for...
A "natural" threshold device is serially connected between the gate of an output depletion mode FET device and the input node to an FET device so as to provide...
US-4,517,051 Multi-layer flexible film module
A high density electronic circuit module which includes a thin flexible film chip carrier having circuitry on both sides thereof. The double-sided thin, flexible...
US-4,509,007 Differential sensor measuring apparatus and method including sensor compensator circuitry
Apparatus and method for measuring the signals from a transducer. The signals are processed to form a differential component normalized by a summation component...
US-4,507,781 Time domain multiple access broadcasting, multipoint, and conferencing communication apparatus and method
A method and apparatus are disclosed for conducting broadcast, multipoint, and conference communications in a TDMA network at various data rates while...
US-4,507,779 Medium speed multiples data
Synchronization can be acquired between a transmitting node and a receiving node on a time division multiple access communication link without the necessity for...
US-4,498,136 Interrupt processor
An interrupt processor is disclosed for an instruction pipelined digital processor, which includes an instruction classification system with a logic class...
US-4,495,490 Word processor and display
A word processor supports two display modes, one unformatted mode comprising display of a partial page and another formatted mode displaying format of an entire...
US-4,489,309 Pipelined charge coupled to analog to digital converter
A pipelined charge coupled analog to digital converter which provides a plurality of serially arranged pipelined stages that are connected to pass signal and...
US-4,488,265 Integrated dynamic RAM and ROS
A combined read-only storage (ROS) and read/write random access memory (RAM) integrated circuit memory cell is disclosed. In a first cell embodiment, a ROS FET...
US-4,488,259 On chip monitor
Level sensitive scan design (LSSD) scan strings on an integrated digital logic circuit chip are employed for multiple functions of providing control parameters...
US-4,485,914 Variable drive pin projection mechanism for a belt sprocket drive wheel
A miniature variable drive pin projection mechanism is disclosed for driving a conveyer belt to transport semiconductor chips from a test point to a sequence of...
US-4,477,902 Testing method for assuring AC performance of high performance random logic designs using low speed tester
A testing technique is disclosed for assuring AC performance of high speed random logic, employing a low speed tester. AC testing on a low speed tester is split...
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