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| Number | Title | Issue Date |
| 5138525 | Multi-purpose strut for digital computer chassis A digital computer chassis has a front and rear wall with a strut fastened to both the front and rear walls, positioned to strengthen the chassis. A power supply and a hard disk drive are located within the chassis and connected to and supported by the st... | 08/11/1992 |
| 5133459 | Shipping container for an article including a ramp and cushion assembly A shipping container for an article includes a floor on which the article is placed, the top surface of which is elevated from the supporting surface upon which the container rests, by a fixed dimension. Four side structures surround the floor and a top p... | 07/28/1992 |
| 5115503 | System for adapting its clock frequency to that of an associated bus only when it requires usage thereof A digital computer system has internal and external devices, with the external devices connected to an associated bus. The digital computer system has a clock frequency which is different from that of the associated bus. Memory addresses from the central ... | 05/19/1992 |
| 5099516 | Digital computer code word identification system A digital computer system has a central processor unit (CPU). A computer program, entered into the digital computer system for execution thereof, has a program code word embedded at an arbitrary location therein. An addressable programmable array of logic... | 03/24/1992 |
| 5099196 | On-chip integrated circuit speed selection An electronic circuit for the detection of required operational speed of one or more integrated circuit semiconductor chips is used in conjunction with an off-the-shelf integrated circuit tester. The tester provides timing, control and a display. Each of ... | 03/24/1992 |
| 5070450 | Power on coordination system and method for multiple processors A computer system includes a first processor, a second processor, a bus shared by the first processor and the second processor, and a power on reset coordination means for the first processor and the second processor. The power on reset coordination means... | 12/03/1991 |
| 5065313 | Digital computer system having circuit for regulation of I/O command recovery time A digital computer system has an I/O command recovery circuit for providing suitable I/O recovery time for any one of a plurality of associated peripheral devices. The circuit, transparent to both software and system execution speed, enables the digital c... | 11/12/1991 |
| 5041962 | Computer system with means for regulating effective processing rates A digital computer system having a local cache memory and a system bus also has a subsystem for regulating the effective processing rate of the central processor unit (CPU) of the computer system. A programmable counter/timer is programmed by data from th... | 08/20/1991 |
| 5036481 | Personal computer system with dual purpose expansion slot A personal computer system has an I/O channel and a memory channel with a main logic board incorporating both the I/O channel and the memory channel. The computer has eight (8) expansion slots including a dual-purpose expansion slot for providing space fo... | 07/30/1991 |
| 5028806 | Battery replacement system for battery-powered digital data handling devices A battery-powered lap-top computer has a main battery for ordinarily supplying power to the computer circuitry. A reserve battery is connected through an automatic switch to the circuitry. The circuitry is connected to a pair of contacts and the switch is... | 07/02/1991 |
| 5008976 | Digital apparatus having a display section adjusted by a hinge assembly with rolling resistance A hinge assembly has a plurality of rollers which are pressed against an elastic washer by a shaft. The rollers and elastic washer are contained within a cylindrical retainer which is held in a fixed position relative to a first bracket, while the shaft i... | 04/23/1991 |
| 4999767 | System having cup operation al error warning facility using visual indicator and real-time clock interrupt routine An electronic digital computer has a warning facility for indicating activity and operation, or lack of same, of the central processor in the system. It is done by providing a signal indicative of continuing operation of the central processor to activate ... | 03/12/1991 |
| 4982120 | Power supply decoupling mechanism for integrated circuits An integrated circuit is formed in a semiconductor chip and connected to at least a first source of voltage and at least a second source of voltage, negative with respect to the first source of voltage. A number of integrated circuit components are activa... | 01/01/1991 |
| 4924355 | Personal computer having expansion card adapter bracket A personal computer has a chassis having a plurality of expansion slots in which are mounted optional Input/Output (I/O) expansion cards. At least one first expansion card has a first bracket adapted for connection to a mounting fixture. At least one seco... | 05/08/1990 |
| 4825973 | Full flow solenoid valve for air gun operation The disclosure relates to a solenoid valve for an air gun which substantially increases the rate at which maximum air flow is achieved. The new valve structure includes a coil actuated plunger, which is preferably solid and formed of a magnetically permea... | 05/02/1989 |
| 4811210 | A plurality of optical crossbar switches and exchange switches for parallel processor computer A computer (30) has parallel elementary processors (P1, . . . , PK) interconnected by an optical crossbar switch (32). Multiple groups of processors, each having a separate crossbar switch, are connected by exchange switches. Optical fibers (34) are used ... | 03/07/1989 |
| 4805128 | Format conversion system A format conversion system for use in digital systems converts digital data words from a fixed point format to a floating point format and vice versa. A two's complement circuit tests the sign bit of a first fixed point digital data word and provides the ... | 02/14/1989 |
| 4438320 | Thermal printing apparatus having a thermal printhead substrate with special geometry for bi-directional printing A printhead configured to thermally print on thermally sensitive paper when traveling in either a forward or reverse direction across the paper. The substrate on which the thermal printhead is supported is especially configured to minimize drag between th... | 03/20/1984 |
| 4435752 | Allocation of rotating memory device storage locations A method of allocating memory space on a cyclic memory system is described. The memory system is partitioned into a plurality of memory regions with each of the regions containing contiguous memory elements. Each of the memory regions is then partitioned ... | 03/06/1984 |
| 4382278 | Hierarchial memory system with microcommand memory and pointer register mapping virtual CPU registers in workspace cache #4 and main memory cache A digital computer system having a plurality of working registers in at least one workspace in its main memory and having a workspace pointer register for indicating the location of the workspace also has a workspace cache memory made up of registers corr... | 05/03/1983 |
| 4372420 | Seismic exploration system Seismic exploration method in arctic regions involving the generation of a seismic disturbance in the water beneath the ice in areas where conventional marine and land exploration methods are functionally inadequate. Seismic disturbances are generated by ... | 02/08/1983 |
| 4355391 | Apparatus and method of error detection and/or correction in a data set Matrix multiplication is used to generate error detection and/or correction binary code bits from a binary input word. A matrix made up of columns and rows of bits set to binary "1"s and "0"s in a pattern conforming to the mathematical expression of a pre... | 10/19/1982 |
| 4355237 | High speed AC/DC coupler A high speed AC/DC coupler has an optical circuit for DC coupling and an AC coupler circuit, both receiving a digital input signal and both providing outputs resulting from the input signal to the same point of a clipper circuit. The response characterist... | 10/19/1982 |
| 4346390 | Solid state recorder A chart recorder has a fixed thermal printhead for recording traces and annotations thereto representative of monitored parameters. A microcomputer, including timing, memory and control circuits controls the operation of the recorder which is enabled to p... | 08/24/1982 |
| 4345171 | Adaptable nonlinear transmission line terminator A nonlinear transmission line terminator terminates a transmission line having an input from any one of a plurality of logic types. Emitter coupled logic (ECL), transistor logic (TTL), Schottky transistor logic (STTL), low power Schottky transistor transi... | 08/17/1982 |
| 4312065 | Transparent intelligent network for data and voice A transparent intelligent communication network having a plurality of nodes and communications paths linking the nodes, wherein reduction in delays for customers wishing to enter the network is achieved by providing a selective first in-first out service ... | 01/19/1982 |
| 4230201 | Air release control in seismic energy source air gun Disclosed is a seismic source device, known in the industry as an air gun, having shuttle control for allowing a predetermined discharge of compressed air into water for purposes of seismic exploration. The shuttle is controlled by secondary shuttle means... | 10/28/1980 |
| 4197589 | Operation sequencing mechanism A mechanism, including a memory, sequences operation in a controlled processor. Each operation is stored in memory together with a portion indicating the current state of predecessor operations required to be completed before execution of the current oper... | 04/08/1980 |
| 4187493 | Frequency multiplexed seismic cable A cable for electrically connecting a plurality of seismic receivers to a central data collecting unit contains a single electrical channel. The output signal of each seismic receiver is used to modulate a carrier signal having its own distinct frequency.... | 02/05/1980 |
| 4175284 | Multi-mode process control computer with bit processing A data processing system has a processing unit adapted to decode instructions and a memory to store the instructions. A communication register has a plurality of binary bit positions with each bit position having bistable states. A first bit position in t... | 11/20/1979 |
| 4172990 | Control system for inductively controlled multi-phase motor A control system moves an inductively controlled multi-phase motor in a forward or reverse direction. The motion may be in steps or it may be a continuous rotation. A microprocessor under the control of a ROM operates through an integrated input/out devic... | 10/30/1979 |
| 4164697 | Method and system for squelching decaying current in motor phases A multiphase stepper motor is used to position the printhead of a thermal printer. Movement of the printhead is controlled by sequentially enabling adjacent phases of the stepper motor. While enabled, the current flowing in any phase is controlled by a sw... | 08/14/1979 |
| 4159516 | Input/output controller having selectable timing and maskable interrupt generation An input/output controller provides a numer of adjustable timers for timing events such as for polling external devices and includes circuitry which generates interrupt vector signals upon the occurrence of certain events, including the expiration of time... | 06/26/1979 |
| 4152691 | Seismic recording method using separate recording units for each group A system of land (field) seismic exploration which eliminates the requirement for a main land cable to transmit seismic data from the sensors to a central recorder is disclosed. The system includes: a seismic source for generating seismic energy; a data a... | 05/01/1979 |
| 4143979 | Printhead needle cap A print member of the printhead of a ballastic type wire matrix printer terminates in an impression end and in an activation end. A cap is formed at the activation end for contact by the blade-like armature of an activating electromagnet. A tip is formed ... | 03/13/1979 |
| 4144489 | Simplified frequency to digital converter using all digital electronics An all digital circuit converts a signal of an unknown frequency into an accurate binary representation of that frequency. The apparatus consists of an all digital closed loop system which has as its input the unknown signal. The closed loop system genera... | 03/13/1979 |
| 4142245 | Multi-frequency digital wave synthesizer for providing analog output signals A digital wave synthesizer provides one of a plurality of available analog output signals in response to and corresponding to a digital input signal. Each of the available plurality of analog output signals is made up of n successive segments of periods A... | 02/27/1979 |
| 4141017 | Thermal printer having expanded character set thermal printhead A thermal printer has a thermal printhead having coincident current-activated semiconductor mesas arranged to a matrix, the number of mesas being greater than the number of x and y drive lines. The printhead has a decoder formed thereon and a number of co... | 02/20/1979 |
| 4141026 | Hall effect generator A semiconductor body has formed on it at least two hall effect plates each having a pair of oppositely positioned current contacts and a pair of oppositely positioned hall voltage contacts, the hall effect plates being positioned with respect to each othe... | 02/20/1979 |
| 4123795 | Control system for a stored program multiprocessor computer A stored program electronic digital computer has a control system for the computer. There are a plurality of processes in the computer. There are four stored program controllers in the computer which operate in different processors within the computer sys... | 10/31/1978 |
