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| Number | Title | Issue Date |
| 6810459 | Reduced complexity computer system architecture An architecture for a computer system that has lower complexity than prior computer system architectures. In one embodiment the functionality that in prior computer system architectures resides in a central processing unit (CPU) is split between a CPU and a program ... | 10/26/2004 |
| 6785254 | Wireless communication system incorporating multicast addressing and method for use A Packet Network for use in association with a wireless communication system employs packet distribution and call set-up methods optimized to select from a plurality of network routing devices, a single node (i.e., Rendezvous Point (VP) or.multicast core) as a funct... | 08/31/2004 |
| 6771593 | Method for improving packet delivery in an unreliable environment A packet delivery method employs redundant path definitions to improve reliability in a packet delivery system. ... | 08/03/2004 |
| 6253091 | Method and apparatus for establishing dynamic group communications A first communication device (18-22) provides a request for the establishment of a group communication to a communication infrastructure (12-14). The request includes a subject matter identifier and may further include a limitation identifier. Based on th... | 06/26/2001 |
| 6091332 | Radio frequency identification tag having printed circuit interconnections A radio frequency identification tag (100) includes a radio frequency identification tag circuit chip (112) bonded to a substrate (114). Additional circuit components (140) are also bonded to the substrate. The substrate is formed to include a number of c... | 07/18/2000 |
| 6040773 | Radio frequency identification tag arranged for magnetically storing tag state information A radio frequency identification tag system (10) utilizes a radio frequency identification tag (16) that includes stored tag information. The tag includes an antenna element (30) and a common electrode (28). The antenna element electrostatically receives ... | 03/21/2000 |
| 5903196 | Self centering frequency multiplier A frequency multiplier (120) having a tunable resonant circuit (122), is anticipated for use with a frequency synthesizer (100) having a Voltage Controlled Oscillator (110). The VCO control line (116) voltage establishes the VCO (110) fundamental frequenc... | 05/11/1999 |
| 5898912 | Direct current (DC) offset compensation method and apparatus A receiver (300) includes input (Iin), output (Vout), forward path with filter (104, and 108), and feedback path with error amplifier (112) coupled into the forward path. Coupled to the feedback path is an error signal storage device... | 04/27/1999 |
| 5880633 | High efficiency power amplifier A high efficiency power amplifier 600 consists of a non-linear radio frequency (RF) Doherty power amplifier (67) and a linearization circuit, such as, for example, a Cartesian Feedback circuit (33), an RF feedback circuit (38), an IF feedback circuit (48)... | 03/09/1999 |
| 5867130 | Directional center-fed wave dipole antenna A directional center-fed half wave dipole antenna is constructed from a multilayer substrate (100) having dipole antenna elements (112, 142) disposed on opposite surfaces (113, 141) of the multilayer substrate (100). An energy reflector (160) is disposed ... | 02/02/1999 |
| 5838285 | Wide beamwidth antenna system and method for making the same A wide beamwidth antenna system (100) having a number of monopole antenna elements (102-108) disposed on at least one surface (111,113) of a single, flexible dielectric substrate (101), a number of antenna feed members (110-116), disposed on the first sur... | 11/17/1998 |
| 5831482 | Method and apparatus for self-tuning a voltage controlled oscillator (VCO) A method and apparatus for tuning the voltage controlled oscillator (VCO) (110) of a Phase Locked Loop (100) by comparing the VCO (110) voltage control line (116) to reference voltage (V1). With feedback, the voltage control line (116) is drive... | 11/03/1998 |
| 5802481 | Adaptive filtering for use with data compression and signal reconstruction A data compression system (200) employs an encoder (210) optimized to decorrelate and make independent from the original signal (202), the quantization noise produced during signal compression by a quantizer (214). Because the quantization noise produced ... | 09/01/1998 |
| 5742899 | Fast attack automatic gain control (AGC) loop for narrow band receivers A fast attack Automatic Gain Control (AGC) loop (100) having a first feedback loop with selectable responses shapes and a second feedback loop with selectable responses shapes. Response shape selection is based, in part, upon fast pull-down, overshoot rec... | 04/21/1998 |
| 5724652 | Method for acquiring a rapid automatic gain control (AGC) response in a narrow band receiver A method for acquiring rapid automatic gain control (AGC) response in a narrow band receiver teaches opening the AGC loop (100), setting the gain control signal (106) amplitude of the AGC amplifier stage (104) to a known value, altering the gain control s... | 03/03/1998 |
| 5529502 | Solderless flexible circuit carrier to printed circuit board interconnection An assembly for electrically interconnecting a printed circuit board (106) to a flexible circuit carrier (104) includes a retention clip (102) for mechanically pressing the printed circuit board (106) against the flexible circuit carrier (104). The printe... | 06/25/1996 |
| 5524007 | Network interface architecture for a packet switch communication system An improved network interface architecture for a packet switch provides for the combination of both voice and data in a single switch using a common packet structure. It allows for the dynamic allocation of bandwidth based on system loading. This includes... | 06/04/1996 |
| 5517500 | Packet handling method An improved network interface architecture for a packet switch provides for the combination of both voice and data in a single switch using a common packet structure. It allows for the dynamic allocation of bandwidth based on system loading. This includes... | 05/14/1996 |
| 5517505 | Synchronization method and apparatus for a wireless packet network In a wireless TDMA network a control module (CM) sends a time stamp relative to the beginning of its frame in a synchronization packet allowing each of a plurality of user modules (UM) to maintain synchronization relative to the CM. The CM uses a pluralit... | 05/14/1996 |
| 5483203 | Frequency synthesizer having modulation deviation correction via presteering stimulus A frequency synthesizer 10 having a digital to analog converter (DAC) 40 and a feedback system which detects the deviation of a frequency modulated signal and aligns the detected deviation. DAC 40 provides a presteering stimulus for alignment purposes. Af... | 01/09/1996 |
| 5477541 | Addressing technique for storing and referencing packet data A hierarchical addressing technique is employed in a packet communications system to enhance flexibility in storing and referencing packet information. This method permits packet message data and certain packet control data to be stored in memory location... | 12/19/1995 |
| 5475681 | Wireless in-building telecommunications system for voice and data communications An improved network interface architecture for a packet switch provides a mechanism for handling voice and data packets. Bandwidth allocation can be changed because control and data memories are synchronized to one another. A hierarchical addressing techn... | 12/12/1995 |
| 5471471 | Signal communication method and apparatus A communications system having a plurality of different radio-types (528, 530 and 532) when integrated into a single node or control module (500) provides communications with a plurality of different end users (502, 506 and 508) having different transmiss... | 11/28/1995 |
| 5459458 | Virtual pager for general purpose data terminal A general-purpose data terminal (242), such as a personal computer, portable computer, notebook computer, personal intelligent communicator, portable wireless terminal and the like employs a radio frequency (RF) modem (408) and is programmed to function a... | 10/17/1995 |
| 5455499 | Method and apparatus for indicating a battery status A battery-status-indicating apparatus and arrangement for use-with electronic equipment (100) provides an operator with a displayed indication of remaining battery capacity. A removable battery pack (35) contains memory (37) for storing battery identifica... | 10/03/1995 |
| 5446769 | Method for providing hand-offs in a frequency hopping communication system A method for handing off user devices (131-134) between network control processors (110, 120) in a frequency hopping communication system (100) includes establishing a set of synchronization frequencies (A-D) for use by said NCPs (110, 120), informing the... | 08/29/1995 |
| 5442783 | Method and apparatus for transferring data base information The present invention discloses a method of maintaining forward and backwards compatibility between various software releases, utilizing different database information and structures. During database transfers the initiating, master, processor requests a ... | 08/15/1995 |
| 5440545 | Packet delivery system A packet switching system (100) having a packet switch (140) employs an acknowledgement scheme in order assure the delivery of all fragments (310) comprising a fragmented data packet (300) to improve overall system throughput during the handling of packet... | 08/08/1995 |
| 5440561 | Method for establishing frame synchronization within a TDMA communication system In a cellular TDMA communication system, prior to the handoff of a mobile unit (225) from a serving base-site (200) to a target base-site, (205 or 210) , the target base-site (205 or 210) establishes frame synchronization with the serving base-site (200).... | 08/08/1995 |
| 5430790 | Call delivery service within a radiotelephone communication system The present invention relates to a method and apparatus for enabling RT subscribers (15, 25 and 35), in radio service areas (1, 2 and 3) serviced by a radio telephone control system (11, 21 and 31) (RTCS), to receive calls originally presented to non-serv... | 07/04/1995 |
| 5406643 | Method and apparatus for selecting between a plurality of communication paths In a data communication system (100), a method is provided to distinguish between and select from multiple communication paths (4,6,and 8)to a designated end point (10). The communications path selection is done locally, on a portable subscriber unit (2).... | 04/11/1995 |
| 5396490 | Packet reassembly method and apparatus A packet switching system (100) employs packet reassembly hardware (214) in a packet switch (140) to improve overall system throughput during the handling of transmission packets (310) that require reassembly. In this manner, reassembly is accomplished wi... | 03/07/1995 |
| 5371623 | High bit rate infrared communication system for overcoming multipath A wireless infrared (IR) communications system (100) for communicating packetized information (302) between a control module (12) and a plurality of UMs (14) via infrared transceivers (300/320) is described as having a selectable communications path. In t... | 12/06/1994 |
| 5355522 | Frequency selection method and apparatus Within a radio frequency (RF) communications system (200) having a plurality of transceivers (10) operating at various frequencies (F1-FN) within a predetermined range, a method (700-722) and apparatus (600) for selecting an operating frequency from withi... | 10/11/1994 |
| 5355520 | In-building microwave communication system permits frequency refuse with external point-to-point microwave systems A wireless in-building RF communications system operates within a building in a microwave frequency range which is also utilized by a point-to-point microwave communication system such that frequency reuse is provided. Central modules and user modules eac... | 10/11/1994 |
| 5341375 | Transmission of broadcast packets in an RF system Transmission of broadcast packets (46) in a radio frequency (RF) communication system between a control module (22) and user modules (20), wherein the control module (22) and the user modules (20) each have a plurality of antennae (A1-A6) includes generat... | 08/23/1994 |
| 5337313 | Method and apparatus for preserving packet squencing in a packet transmission system A method and apparatus for preserving the sequential relationship of a plurality of data packets 310 generated by separate source devices 14 and ordered as a data stream 300, despite transmission over radio channels which introduce ordering errors compris... | 08/09/1994 |
| 5326414 | Method for making electrostatic RF absorbant circuit carrier assembly An electrostatic RF absorbant circuit carrier assembly production method including the steps of forming a polymeric support structure having a base and surrounding walls which form an internal cavity from plastic, disposing a plurality of conductor paths ... | 07/05/1994 |
| 5325984 | Friction clutch for dual pivot point hinge A friction clutch (440) for use with a 360 degree dual pivot point hinge (106) permits rotation about but one pivot point axis (444 or 445) at a time to assure proper 180 degree operation of each hinge member (411, 413 and 412, 414) associated with the hi... | 07/05/1994 |
| 5325536 | Linking microprocessor interrupts arranged by processing requirements into separate queues into one interrupt processing routine for execution as one routine Multiple interrupt request data is stored in a queue and handled by a single interrupt sub-routine to provide a batch handling capability to maximize the interrupt handling efficiency of a microprocessor. Events are organized into groups having a common i... | 06/28/1994 |
