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| Number | Title | Issue Date |
| 5809016 | Selective call receiver and method of processing diversity messages In a communication system that transmits diversity messages (an original message followed by one or more copies thereof), a selective call receiver (10) which receives an original message and one or more copies will display only one of the received messag... | 09/15/1998 |
| 5805121 | Liquid crystal display and turn-off method therefor In a liquid crystal display (16) having rows and columns of pixels (22), one or more selected rows of pixels are turned off (put in a standby mode) in a manner that saves power. A row of pixels is turned off by applying to the row a cyclical two-level vol... | 09/08/1998 |
| 5771576 | Strain relief device and method A strain relief device (10) for wires is formed of a nonconductive plate (12) having a central axis (18) and a plurality of through-holes (14) distributed around the central axis (18). Each through-hole has a diameter selected to permit a wire to pass thr... | 06/30/1998 |
| 5770980 | Fast starting oscillator A low power, fast starting oscillator (10) of the Colpitts type includes an amplifier (12) that provides voltage gain and feeds a source follower circuit (14) that provides a desirable output impedance. A crystal (16) is coupled from an output of the sour... | 06/23/1998 |
| 5767786 | Method of providing voice memos in a selective call receiver A method, in a SCR (Selective Call Receiver) (10), for providing to a user of the SCR (10) a voice memo in explanation of a received message. The SCR stores distinctive data (63) and a user-generated voice memo (67) that relates to the distinctive data. T... | 06/16/1998 |
| 5745006 | Method of compensating for distortion in an amplifier A method of providing compensation for distortion imparted to an input signal, principally by an amplifier (18), compares a delayed version of the input signal (34) to the amplifier's output signal. The result of the comparison is an error signal that is ... | 04/28/1998 |
| 5740532 | Method of transmitting emergency messages in a RF communication system A method for an RF base station (105) to transmit an emergency message to a selective call receiver (104). The base station (105) receives incoming messages that are to be transmitted to selective call receivers, some of which incoming messages are emerge... | 04/14/1998 |
| 5740541 | Method for transmitting local area/wide area messages and selective call receiver for use therewith A method in a communication system (100) having a high power transmitter (104) for transmitting messages to selective call receivers (102) located within a wide coverage area (114), and having at least one low power transmitter (108) for transmitting mess... | 04/14/1998 |
| 5710975 | Selective call transceiver with system approved power saving state A battery-powered selective call transceiver, operating in two-way communication with an RF communication system, can be put in a power saving state. A user control on the transceiver allows a user to select the duration of a power saving interval. The tr... | 01/20/1998 |
| 5710547 | Selective call transceiver and method of re-registering same A method for re-establishing communication between a base station (102) that transmits on a forward channel, and a subscriber unit (108) that has temporarily lost the forward channel, uses the concept of a re-registration interval. The base station (102) ... | 01/20/1998 |
| 5705995 | Selective call receiver and method of storing messages therein A selective call receiver such as a pager (44) sorts and stores received messages (24-32) by categories and, optionally, by sub-categories as well. The category of a received message is determined by comparing a received message to identifying data (106) ... | 01/06/1998 |
| 5703571 | Selective call transceiver with customized canned messages A SCT (Selective Call Transceiver) (10) includes a memory (54) which stores a list (60) of addressees with whom the SCT user normally communicates. The memory also stores, for each of selected addresses, an associated group (62) of customized messages. Th... | 12/30/1997 |
| 5701600 | Radio receiver and method of calibrating same A method of calibrating a radio receiver (100) which has a desired IF center frequency (fo) includes generating and applying to the receiver's demodulator (126) a plurality of reference signals. The demodulated reference signals are used to generate, for ... | 12/23/1997 |
| 5697538 | Holster for a portable communication device A one piece holster 10 for a PCD (Personal Communication Device) 24 has a back wall 14, sidewalls 18 and a bottom ledge 20 formed to receive a PCD either by lateral or vertical insertion. A snap fit feature and a locking mechanism 38 hold the PCD securely... | 12/16/1997 |
| 5612682 | Method and apparatus for controlling utilization of a process added to a portable communication device A method and apparatus in a communication system operated by a service provider controls utilization of a module (602, 606) added to a portable communication device (122) including a transceiver (302) which communicates with a fixed portion (102) of the c... | 03/18/1997 |
| 5612614 | Current mirror and self-starting reference current generator A current mirror (100) has an input stage (104) and an output stage (106), both preferably employing FET's. (Field Effect Transistors) An amplifier (102) equalizes drain-to-source voltages between FET's in the input and output stages to provide a higher o... | 03/18/1997 |
| 5613237 | Housing latch system utilizing an elastomeric interlocking band A latch system for a housing includes front and rear housing sections (204, 202) having a common side periphery (212) when assembled. The housing sections (204, 202) include wall segments (208, 206) projecting therefrom. Each wall segment (208, 206) has a... | 03/18/1997 |
| 5574975 | Paging method using power shifted transmitters Transmitters (18) in a two-way radio communication system (10) transmit location inquiries to subscribing pagers (14), each transmission occurring at a given power output level. Each pager (14) is capable of responding with an acknowledgment signal identi... | 11/12/1996 |
| 5537683 | Radio paging system with antenna pattern exhibiting high diversity gain A radio paging system includes one or more transmitters (12) for sending radio signals to pagers (14) within a paging service area (10). Receivers (22) are located within the service area to receive low power transmissions from the pagers. These receivers... | 07/16/1996 |
| 5335361 | Integrated circuit module with devices interconnected by electromagnetic waves An integrated circuit module (501), with enclosed semiconductor devices (107, 115), includes a housing (101) with an electromagnetic wave reflective interior surface (103). A transmitter (105), mounted on a semiconductor device (107), transmits signals de... | 08/02/1994 |
| 5179501 | Laminated electronic module assembly An electronic module assembly includes a relatively thin, bendable base plate having at least one bend axis along which the base plate is bent over on itself to provide an enclosure. An inner surface of the base plate supports at least one, and preferably... | 01/12/1993 |
| 5175668 | Circuit board for a component requiring heat sinkage A circuit board (2) for receiving a component (38) requiring heat sinkage. The circuit board has a base portion (4) and a heat sink form portion (6) integral with the base portion. The heat sink form portion has a heat sink form and a coating (58) of ther... | 12/29/1992 |
| 5173709 | Electronic direction finder An electronic direction finder (10) includes a navigation receiver (28) and a compass (32) to generate a bearing signal that indicates that direction of a desired destination. The bearing signal is received by a display driver (34) which causes an electro... | 12/22/1992 |
| 5170326 | Electronic module assembly An electronic module assembly (50) has a bendable base plate (52) upon which circuit components (76) are mounted. A module enclosure device (56) mates with the base plate and has an integrally formed, non-removable support arm (96). During assembly, the b... | 12/08/1992 |
| 5156127 | Method for optimizing plug firing time and providing diagnostic capability in an automotive ignition system The firing time of a spark plug (22) is optimized by measuring its actual firing time (as by detecting the rise of current in the secondary winding (44) of an ignition coil (24)), comparing the actual firing time to the desired firing time, and advancing ... | 10/20/1992 |
| 5156038 | Calibration technique for a vehicle's differential odometer A method for calibrating a differential odometer in a vehicle (10) having a pair of wheels (14, 16) and a pair of associated wheel sensors (18, 24) which generate output pulses as their associated wheels rotate. The method includes driving the vehicle (10... | 10/20/1992 |
| 5138516 | Fault sensing and driving system for output driver device A driver circuit (10), with a minimum number of interconnects between itself and a conventional output driver device (14), controls the normal on/off operation of the output driver device, and additionally senses various fault conditions within the output... | 08/11/1992 |
| 5136998 | Automotive control unit with internal sensor In applications involving automotive engines and transmissions that are controlled by an electronic controller (13) in response to inputs from a sensor (20), the sensor (e.g., temperature sensor, accellerometer, etc.) is enclosed in the same housing that ... | 08/11/1992 |
| 5136704 | Redundant microprocessor control system using locks and keys A redundant processing system includes a pair of processors, each processor having an error detector, a key generator, and a lock circuit. The error detectors sense the outputs generated by their processors and generate an error signal when defective data... | 08/04/1992 |
| 5126659 | Enablement of a test mode in an electronic module with limited pin-outs A method for establishing a test mode in an electronic module (10) having an internal fault detector (26) that limits the current in an output transistor (Q1) when an abnormal signal level appears at an output pin (16). An abnormal signal level is intenti... | 06/30/1992 |
| 5119683 | Solenoid controller with flyback pulses useful for diagnostics and/or control Measurement of fluid flow (or other fluid parameter) through a solenoid-actuated valve (12), and/or measurement of nominal operation of the valve itself, is achieved in one embodiment by modifying the amplitude of flyback pulses (48) generated by the sole... | 06/09/1992 |
| 5084668 | System for sensing and/or controlling the level of current in a transistor A transistor sense electrode (20) is coupled to the input branch (24) of a current mirror (22). The current mirror's branch (26) carries a current substantially equal to the current in the input branch to indicate the current flowing in the transistor. A ... | 01/28/1992 |
| 5079456 | Current monitoring and/or regulation for sense FET's A method and apparatus is disclosed for measuring and/or controlling the level of current in a Sense FET which includes a power transistor (M1) and a sense transistor (M2). The transistors (M1) and (M2) are both biased to operate in a linear mode, and the... | 01/07/1992 |
| 5054461 | Ionization control for automotive ignition system A method and apparatus is disclosed for controlling the duration of ionization of spark plugs in an internal combustion engine. Generally, the ionization times of the spark plugs are individually measured and compared against a reference ionization time t... | 10/08/1991 |
| 5053911 | Solenoid closure detection A method and apparatus for electronically detecting when a solenoid has closed, or nearly closed, indirectly senses changes in the inductance of the solenoid's coil as the solenoid closes. When the inductance has changed by a selected amount, the solenoid... | 10/01/1991 |
| 5050423 | Multi-variable sensor calibration In a calibration circuit for calibration of the output of a differential sensor, signals adjustable in gain for calibration are summed with potentiometrically derived signals for offset calibration to provide a single ended output. Additionally, a signal ... | 09/24/1991 |
| 5027785 | Simplified ignition system for multi-cylinder engines Fuel is sequentially injected directly into each cylinder of a an engine that has at least three cylinders. Then, an ignition potential is applied to all cylinders simultaneously, but at an angle that ensures that only a selected one of the cylinders expe... | 07/02/1991 |
| 5019722 | Threshold crossing detection with improved noise rejection A detection scheme processes the output signal from a sensor so as to provide an ultimate output signal that is more noise resistant and that has a transition representative of a threshold crossing in the sensor signal. A key part of the detection scheme ... | 05/28/1991 |
| 5012381 | Motor drive circuit with reverse-battery protection A relay-less drive circuit for an inductive load preferably uses a transistor switch to couple the load to a battery, and provides a path for recirculating current around the load, which path includes a recirculating diode coupled in series with another t... | 04/30/1991 |
| 5001364 | Threshold crossing detector A method and apparatus is disclosed for forming a binary level output signal which has a single transition representative of a threshold crossing in a sensor output signal. The sensor output signal is applied to the inputs of two signal processing circuit... | 03/19/1991 |
