Quotables
"Rail travel at high speeds is not possible because passengers, unable to breathe, would die of asphyxia."
Dionysius Lardner, Professor of Natural Philosophy and Astronomy at University College, London ; 1830
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| Number | Title | Issue Date |
| 6215474 | Communication device with mode change softkeys A communication device (100) operates in first and second modes of operation including a dispatch mode of operation and a telephone mode of operation. The device (100) includes a main body (124) having a top surface (126) and a cover (102). The cover 102 ... | 04/10/2001 |
| 6208526 | Mounting multiple substrate frame and leadless surface mountable assembly using same A multiple substrate mounting frame (104) includes first (132) and second (130) surfaces and a plurality of windows or cavities (106-112). A set of substrates having electrical circuitry (114-120) are attached and electrically connected to the first surfa... | 03/27/2001 |
| 6141540 | Dual mode communication device A communication device (100) operates in first and second modes of operation including a dispatch mode of operation and a telephone mode of operation. The device (100) includes a main body (124) having a top surface (126) and a cover (102). The cover 102 ... | 10/31/2000 |
| 6135582 | Communication device housing interconnect A portable communication device assembly comprises a first communication device housing (12), a second communication device housing (14), and a snap retainer (40) for interconnecting the housings (12 and 14).... | 10/24/2000 |
| 6119007 | Method of transmitting call information A method of transmitting call information includes transmitting (201), within a first cell (105), call information relating to a call taking place within the first cell (105) and transmitting (203), within a second cell (103), the call information relatin... | 09/12/2000 |
| 6104350 | Retractable angled antenna assembly An antenna assembly includes a straw having a substantially linear passageway and a helix base coil with an angled tapered guide, the passageway having a width wider than the widest portion of the angled tapered guide. An antenna element has a stopper por... | 08/15/2000 |
| 6104916 | Hinge pin A hinge pin assembly for a communication device (100) includes a partially assembled hinge base (105). The base (105) has a receiving receptacle (148), an edge (153) of the receiving receptacle, and a socket (160) having a wall (164). A hinge body member ... | 08/15/2000 |
| 6088240 | Hinged flip assembly for a communication device A hinged flip assembly includes a door cover (120) having a chamber (214) and a hub (122) for rotating along a hinge mechanism (133). A transducer (206) is disposed in the chamber (214). At least one wire (202) is coupled (222) through the hub (122) of th... | 07/11/2000 |
| 6064577 | Bottom insert belt clip mount on battery A belt clip (100) attaches to a battery housing of a communication device to be worn by a user. The belt clip (100) includes a base (104) and a flexible spring loaded latch (106) having an opening. The base (104) is comprised of a pair of rails (108). The... | 05/16/2000 |
| 6035005 | Receiver with baseband I and Q demodulator A baseband demodulator receives inphase and quadrature signals I (116) and Q (117) representing a phase angle and amplitude. The demodulator (114) includes a discrete time continuous amplitude circuit (223, 253, 260) coupled to the quadrature generator to... | 03/07/2000 |
| 6025804 | Antenna with absorptive radiation shield An antenna (100) includes a radiating element (202) covered with a protective jacket having at least one pocket selectively located therein. The at least one pocket (102) is filled with a material (105) having an absorptive index substantially higher than... | 02/15/2000 |
| 5978661 | Transmitter circuit and method of operation A transmitter circuit including an oscillator circuit (30) having at least one input for receiving at least one modulation signal and an output (32) for providing a modulated signal. A modulation circuit (13) is operably coupled to the at least one input ... | 11/02/1999 |
| 5893029 | Baseband phase-locked direct conversion receiver with frequency offset To generate a fixed frequency offset in a direct conversion receiver (200) a phase ramp representing the frequency offset if generated. This phase ramp is combined with the demodulated phase component of a received signal. A phase wrap detection and compe... | 04/06/1999 |
| 5881947 | Method for soldering A method for soldering components to opposite sides of a receptive element includes the steps of applying a solder formulation to both sides of the receptive element (201) and placing components on a first side of the receptive element (204). The solder f... | 03/16/1999 |
| 5881112 | Modulator with baseband to phase converter A phase demodulator (101) is used for sensing the phase-- angle of a phasor represented by the I and Q signals by first producing the analog I and Q signals in a direct conversion receiver (104). A phase generator (106) is used to approximate t... | 03/09/1999 |
| 5869204 | Battery latch for a communication device A battery package (100) includes a latch (106) for easy attachment to a radio (402). Engagement of the battery package (100) to the radio is accomplished via matching a plurality of retaining rails (110) via notches (112) with a plurality of opposing and ... | 02/09/1999 |
| 5812038 | Volume efficient resonator A volume efficient resonator (100) includes a helical coil transmission line (108) fabricated on a plurality of dielectrics (212, 214, 216, 218, 220, 222, 224, and 226). The transmission line (108) includes selectively metalized areas (210) on the dielect... | 09/22/1998 |
| 5802484 | Adaptive antenna structure for a computational device An antenna structure (108) operates in the presence of narrow or wide band interference and yet is able to enjoy high receiver sensitivity. This is done by steering the antenna structure (108) radiation pattern null in its near field at the noise source.... | 09/01/1998 |
| 5799246 | Radio with synthesizer and VCO A radio is described having a synthesizer (17) and a VCO (18). Each of the synthesizer and the VCO has a connection to a ground plane (13) of the radio. The ground plane connection of the VCO has a first capacitor (43) and a further ground connection (40)... | 08/25/1998 |
| 5794154 | Communications system and method of operation A method of operation of a radio communications system having a controller controlling communications of a plurality of communicating units on a plurality of communication channels. The method includes the steps of a first communications unit transmitting... | 08/11/1998 |
| 5770330 | Battery package with multiple surface charging contacts A battery (100) includes charging contacts (102) having a number of exposed planes (104, 106, and 108) for versatility charging battery cells (112) via a number of charging configurations (402 and 502). Three different charging embodiments; a radio chargi... | 06/23/1998 |
| 5771374 | Event driven programmer logic controller processor arrangement with buffered inputs and method of operation of the same A processor arrangement is described having a programmer logic controller (PLC) operating to a ladder diagram process. A number of event inputs (11-15) are provided connected to an interrupt buffer (31), in turn connected to a real time clock (32), for re... | 06/23/1998 |
| 5771440 | Communication device with dynamic echo suppression and background noise estimation Echo suppression is accomplished by comparing the ratio of the microphone (101) and speaker (121) energies to a dynamic threshold that varies with the background noise (310) at a second communication device (130), and transmitting locally generated noise ... | 06/23/1998 |
| 5754954 | Communication unit with over the air programming A communication unit (100) for operation in a communication system (600). The communication system (600) includes a plurality of communication units (100) and a control resource (300). The communication unit (100) includes a transmitter (118) for transmit... | 05/19/1998 |
| 5748454 | Battery clip assembly for a communication device A belt clip (100) attaches to a communication device to be worn by a user. The belt clip (100) includes a base (104) and a flexible latch (106). The base (104) is comprised of a pair of rails (108) that has a pair of skies (110). The pair of rails (108) a... | 05/05/1998 |
| 5742004 | Coplanar interlocking shield A shield (100) includes a raw sheet metal part (102) that is formed to include a tab 108 along with its biasing feature (110) at one end and a locating slot (114) at the other. This sheet metal part (102) is bent to form, whereby the tab (108) is engaged ... | 04/21/1998 |
| 5740066 | Electrical circuit board and circuit board assembly An electrical circuit board (100) includes a substrate (101) on which a metallized bar code pattern (104) is disposed. The substrate (101) further includes an electrical circuit metallization pattern (103) which incorporates at least a portion of the meta... | 04/14/1998 |
| 5715240 | Communication device capable of estimating signal quality without synchronization pattern A method determines the signal usability of an adjacent channel in a multi-cell communication system without the aid of synchronization symbols. In general, a three step search is used to arrive at the adjacent channel signal quality. The first step is a ... | 02/03/1998 |
| 5710568 | Antenna and method of manufacture of a radio An antenna is described having a generally elongate radiating part (10) and a reflective plane (11)juxtaposed and generally parallel to the elongate radiating part. The radiating part has a free end (15), a ground connection (13) remote from the free end ... | 01/20/1998 |
| 5675286 | Method and apparatus for an improved linear transmitter An amplifier structure (200) includes a main amplifier loop (203) for efficiently amplifying an input signal at a power amplifier (228) coupled to a load susceptible to impedance variations. The amplifier loop (200) further includes an auxiliary loop (201... | 10/07/1997 |
| 5675614 | Digital squelch circuit A digital squelch system (100) includes a timing signal generator (102) for generating a reference window. An edge detector (106) detects edges in the input signal during this reference window. An accumulator (110) accumulates the number of coherencies. A... | 10/07/1997 |
| 5655099 | Electronic device with microprocessor and banked memory and method of operation An electronic device is described having a microprocessor (100) and banked memory (otherwise known as virtual memory, 15, 16) as well as a method of operation of a such a device. A selected program is run from a first banked memory (15). An access program... | 08/05/1997 |
| 5651030 | Receiver with signal classifier Briefly, according to the invention, a receiver (100) for receiving and decoding a carder signal is described. A carrier signal is modulated with an information signal which has one of a plurality of formats. The receiver includes a circuit (104) for rece... | 07/22/1997 |
| 5648766 | Circuit with supply voltage optimizer An electronic device (100) includes a regulator (102) for generating an operating voltage. The device (100) also includes at least one component (110) using the operating voltage and requiring a minimum input voltage for proper operation. The device (100)... | 07/15/1997 |
| 5621762 | Radio with peak power and bandwidth efficient modulation A communication device (300) includes a digital modulator (301), a Digital Signal Processor (306), and an amplifier (312). The digital modulator (301) includes an information generator (304) and a peak suppression device (402). The peak suppression device... | 04/15/1997 |
| 5621362 | Cascode oscillator having optimum phase noise and bandwidth performance An oscillator (100) includes a tank circuit (102) coupled to a an active circuit (108). The feedback (104) provides the necessary feedback between the tank and the active circuit necessary for oscillation. The active circuit (108) is biased via a biasing ... | 04/15/1997 |
| 5615096 | Direct current power supply conditioning circuit A power supply (200) includes a VVC (222) which provides for the efficient conversion of voltages with minimum ripple. The doping of the VVC (222) is altered such that most of the energy is delivered to a load (224) at a substantially constant voltage. Th... | 03/25/1997 |
| 5606438 | Rugged liquid crystal display and method of manufacture A ruggedized liquid crystal display (LCD) is described having a LCD sandwich (30, 31). A layer of adhesive material (35), such as adhesive coated polyester film, extends continuously across a surface (e.g. the top surface) of the LCD sandwich. A layer of ... | 02/25/1997 |
| 5606578 | Radio with peak power and bandwidth efficient modulation using asymmetric symbol constellations A communication device (300) includes a digital modulator (301), a digital to analog converter (308), an RF mixer (310) (306), and an amplifier(312). The digital modulator (301) includes an information generator (304) and a signal processor (306). The pro... | 02/25/1997 |
| 5551068 | Method and apparatus for communication variable length messages between register modeled radio devices A radio system (100) includes a plurality of addressable processors (150, 180, and 200). A communication link (230) interconnects the addressable processors (150, 180, and 200). The communication between the addressable processors is conducted via a first... | 08/27/1996 |
