Patents Represented by Attorney, Agent or Law Firm Steven G. Parmelee
  • TDM/FDM communication system with pseudo-duplex capability
    Patent number: 5025442
    Abstract: A communication system that provides pseudo-duplex communications between communication units. A control slot is used to allow a receiving unit to transmit a request to interrupt, and to instruct a transmitting unit to interrupt its transmissions and to begin receiving.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: June 18, 1991
    Assignee: Motorola, Inc.
    Inventors: Charles N. Lynk, Eric R. Schorman
  • Radio component replacement/programming device
    Patent number: 5020144
    Abstract: A programming station for use in programming and servicing two-way radios that include replaceable hardware elements. Both user-only and programming station-assisted steps are simultaneously displayed in a predetermined order. The steps may only be accomplished in a fixed allowed order.
    Type: Grant
    Filed: March 30, 1988
    Date of Patent: May 28, 1991
    Assignee: Motorola, Inc.
    Inventors: Thomas F. Shirley, Jr., Jack B. Butler
  • Field emission device having preformed emitters
    Patent number: 5019003
    Abstract: A field emitting device having a plurality of preformed emitter objects. The emitter objects include sharp geometric discontinuities, and a significant number of these geometric discontinuities are oriented in a way that supports desired field emission activity. Field emission devices built with such emitters can be utilized to provide a flat display screen.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: May 28, 1991
    Assignee: Motorola, Inc.
    Inventor: Marc K. Chason
  • Adaptive identifying signal detector
    Patent number: 5020141
    Abstract: A radio receiver capable of receiving more than one channel, one of which channels may be a priority channel, wherein some communications may be accompanied by a sub-audible continuous identifying signal, which signal can be detected by the radio in an adaptive way. In particular, a wideband, rapid detect approach can be utilized in the absence of a determination that adjacent identifying signals are present. To the extent such adjacent signals are present, the radio selects a narrowband, slower detection approach, or, in the alternative, shifts the bandpass characteristics of the wideband approach in an attempt to avoid the adjacent interfering signal.
    Type: Grant
    Filed: November 3, 1989
    Date of Patent: May 28, 1991
    Assignee: Motorola, Inc.
    Inventor: William R. Meszko
  • Universal frequency assignment protocol for trunked radio systems
    Patent number: 5020130
    Abstract: A trunked communication system wherein channel assignment information is provided to a requesting subscriber unit in a dual word format that includes separate and specific information regarding both a transmit frequency and a receive frequency. The transmit and receive frequency information is provided in a coded form, which can be decoded by the subscriber unit with reference to a table of information stored therein in conjunction with a simple algorithm.
    Type: Grant
    Filed: March 2, 1988
    Date of Patent: May 28, 1991
    Assignee: Motorola, Inc.
    Inventors: Gary W. Grube, Timothy A. Monahan-Mitchell, Kenneth J. Zdunek
  • Method for dynamically regrouping subscribers on a communications system
    Patent number: 5014345
    Abstract: An improved communication system is disclosed wherein at least one reprogramming station is added to a communication system. The reprogramming station is constructed and arranged to communicate with the subscriber units thereby either reprogramming or regrouping them. The subscribing units receive the reprogramming command and acknowledge individually, altering a memory means until either reprogrammed back to the original state, or to another state. In another mode, the reprogramming station transmits a regrouping command wherein two or more groups are combined to form a super group.
    Type: Grant
    Filed: October 20, 1988
    Date of Patent: May 7, 1991
    Assignee: Motorola, Inc.
    Inventors: Richard A. Comroe, Kenneth J. Zdunek, Michael D. Sasuta, Daniel J. Coombes, Jaime A. Borras
  • Rotatable contactless antenna coupler and antenna
    Patent number: 5014346
    Abstract: A rotatable contactless RF signal coupler, which couples RF signals between an antenna and an RF signal processor in a portable radio, along with an antenna capable of operating in two modes is described herein. Specifically, the signal coupler includes a transformer that is primarily located within the hinge formed by the housing of the radio and a rotatable flip portion. Substantially constant inductive coupling is maintained in the coupler regardless of rotation. The antenna is capable of operating in a narrow band and a wide band mode to afford antenna operation through varied conditions.
    Type: Grant
    Filed: January 4, 1988
    Date of Patent: May 7, 1991
    Assignee: Motorola, Inc.
    Inventors: James P. Phillips, Robert M. Johnson, Jr., Michael W. Zurek
  • Non-planar field emission device having an emitter formed with a substantially normal vapor deposition process
    Patent number: 5007873
    Abstract: A cold cathode field emission device having a cone shaped emitter (112, 208) formed with a substantially normal (but not absolutely normal) vapor deposition process (109) wherein the substrate (101, 201) need not be rotated with respect to the vapor deposition target. The vapor deposition process forms an encapsulating layer (111, 207) that can either be utilized as an electrode within the completed device, or that can be removed to allow subsequent construction of additional layers.
    Type: Grant
    Filed: February 9, 1990
    Date of Patent: April 16, 1991
    Assignee: Motorola, Inc.
    Inventors: Herbert Goronkin, Robert C. Kane
  • Direct conversion FM receiver
    Patent number: 5003621
    Abstract: A direct conversion FM receiver that comprises a quadrature mixer, an A to D converter, a digital demodulator, a digital phase lock loop, and frequency offset setting means is disclosed. The quadrature mixer receives FM signals and mixes them with a local oscillator signal to produce an analog in-phase baseband signal and an analog quadrature baseband signal. The analog in-phase baseband signal and the analog quadrature baseband signal are converted into digital signals by the A to D converter. The digitally converted baseband and quadrature signals are digitally demodulated and filtered by the digital demodulator such that modulation information is produced. The modulation information is used, at least in part, to control the phase lock loop means.
    Type: Grant
    Filed: November 2, 1989
    Date of Patent: March 26, 1991
    Assignee: Motorola, Inc.
    Inventor: Paul H. Gailus
  • Simulcast broadcasting system and method
    Patent number: 5003617
    Abstract: A simulcast broadcast system wherein two signals (103 and 106) intended for simultaneous broadcast are transmitted from a source site (100) to remote sites (200) discrete from one another. At the remote sites, the two signals are separately processed, including the introduction of appropriate delay (305 and 312), prior to combining them for broadcast in conjunction with other remote sites. One or more monitoring sites (400) can also be provided to monitor reception coherence within the system and to provide operating measurement information to allow automatic control of various simulcast system parameters, including delay.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: March 26, 1991
    Assignee: Motorola, Inc.
    Inventors: Robert L. Epsom, Paul M. Erickson, Paul J. Cizek, Christopher H. Wilson
  • Decryption device with variable clock
    Patent number: 5001756
    Abstract: A decryption device wherein an encryption/decryption module can be operated at various clock speeds, and wherein an associated processor controls these clock speeds depending upon the moment to moment processing interrelationship between the encryption/decryption module and the processor. In particular, when loading a new key into the encryption module, or when utilizing the encryption module to decrypt an encrypted new key, the processor alters the usual clock rate for the encryption module.
    Type: Grant
    Filed: August 11, 1989
    Date of Patent: March 19, 1991
    Assignee: Motorola, Inc.
    Inventors: Kevin B. Mayginnes, Bruce D. Oberlies
  • Superconducting thick film
    Patent number: 4997812
    Abstract: An Ytrium Barium Copper Oxide-based thick-film paste is disclosed, which when deposited on an alumina substrate is superconducting above the termperature of liquid nitrogen and substantially free of mechanical defects such as cracking or peeling. A method of applying the paste, including the curing process, insures that the YBC superconductor is boned to the substrate.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: March 5, 1991
    Assignee: Motorola, Inc.
    Inventor: Rong F. Huang
  • Method and apparatus for utilizing unpresented communication groups
    Patent number: 4995095
    Abstract: In a communication system that comprises a plurality of communication resources, a plurality of consoles, a communication resource allocator, and a plurality of subscriber units arranged into a plurality of communication groups, the communication resource allocator comprises memory for storing presented and unpresented communication groups. By storing unpresented communication groups, a console, via an associated operator MUX interface module, may automatically utilize the unpresented communication groups without intervention from an operator of the console.
    Type: Grant
    Filed: March 5, 1990
    Date of Patent: February 19, 1991
    Assignee: Motorola, Inc.
    Inventors: Jeffrey G. Lohrbach, Gregory A. Dertz, Michael S. Densmoor
  • Communication control console center with improved volume control
    Patent number: 4987599
    Abstract: An improved communication control console center wherein the volume level for a selected communication resource will be set to a predetermined initial volume level, which level may be changed thereafter by appropriate adjustment of a multi-level switch.
    Type: Grant
    Filed: March 29, 1989
    Date of Patent: January 22, 1991
    Assignee: Motorola, Inc.
    Inventors: Steven B. Most, Hillel A. Meyers, Susanne L. Dunsmore, Jeffrey J. Blanchette
  • Spectrally efficient method for communicating an information signal
    Patent number: 4979188
    Abstract: According to the invention, an information signal, such as a information signal, is sampled, quantized and processed digitally through an information encoder. Digitally processed samples produced by the encoder are modulated onto a communication channel to create channel symbols having a magnitude of modulation proportional to a characteristic of a respective digitally processed sample. Both a radio frequency (RF) transmission embodiment, and a wireline embodiment are provided. In a final aspect of the present invention, encryption is provided to ensure communication privacy.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: December 18, 1990
    Assignee: Motorola, Inc.
    Inventors: Michael D. Kotzin, Anthony P. van den Heuvel, Kenneth J. Crisler, Bradley M. Hiben, Lawrence M. Mohl, Mark R. Poulin
  • Antenna selection control circuit
    Patent number: 4977616
    Abstract: An antenna switch control circuit for use in achieving antenna selection diversity in TDM RF receivers. RSSI for at least one antenna is monitored during time slots containing information not of interest. This information can then be compared with other antenna performance information to allow a selection to be made such that the receiver generally operates with the antenna receiving the strongest signal. In one embodiment, all possible antennas are monitored during a time slot containing information not of interest. In another embodiment, RSSI for the selected antenna can be monitored during the time slot of interest, such that antenna selection can again be varied should the selected antenna diminish in performance.
    Type: Grant
    Filed: October 26, 1989
    Date of Patent: December 11, 1990
    Assignee: Motorola, Inc.
    Inventors: Donald L. Linder, Steve H. Goode, Henry L. Kazecki, Donald W. Dennis, James C. Baker
  • Soft logic cryptographic circuit
    Patent number: 4972478
    Abstract: A soft logic cryptographic circuit that can be reprogrammed with various cipher algorithms. The cryptographic circuit can be manufactured in a non-secure environment because a security sensitive cipher algorithm can be programmed after the manufacturing process.
    Type: Grant
    Filed: July 3, 1989
    Date of Patent: November 20, 1990
    Assignee: Motorola, Inc.
    Inventor: Ezzat A. Dabbish
  • High powered amplifier and heat sinking apparatus
    Patent number: 4963833
    Abstract: An improved high powered power amplifier, where the improvement comprises an improved grounding technique by decreasing the contact resistance, and an improved thermal transfer and dissipating technique. The heat generated by a power amplifier device is transferred and dissipated substantialy outside a chassis and is in direct contact with a heat sinking device located outside the chassis. By having the heat transfer and heat dissipation occurring outside the chassis and by having the power amplifier device in direct contact with the heat sinking device, the power amplifier is capable of reliably operating at higher power levels.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: October 16, 1990
    Assignee: Motorola, Inc.
    Inventor: Michael C. Mountz
  • Radio console with CRT display
    Patent number: 4961070
    Abstract: A radio console having a CRT display that allows channel control windows (CCWs) to be moved about a work area or from a summary list to a work area and back again. The CCWs may be of various sizes, and the display provides helpful indications of suitable locations to where selected windows may be moved. The display also allows preselected windows to be linked one to another, and to ensure that when one of the linked windows is moved, the remaining linked windows are moved in tandem with it. Also, if a window is manipulated to cause it to occlude an adjacent window, a distinct border is provided for the occluding window to indicate to the user that such occlusion heat occurred.
    Type: Grant
    Filed: June 2, 1988
    Date of Patent: October 2, 1990
    Assignee: Motorola, Inc.
    Inventors: John W. Maher, Keith I. Mulford, James C. Tykal
  • Coil-less overtone crystal oscillator
    Patent number: 4959624
    Abstract: A crystal oscillator circuit for use with overtone crystals restricts its resonant frequency to either fundamental or overtone frequencies. An inverting amplifier, which provides 180 degrees of phase shift by inverting an input signal, includes components which effectively provide another 180 degree phase shift at a particular frequency by adding a time delay. The 180 degree phase shift by a signal inverting amplifier, with the included 180 degree phase shift provided by the time delay comprises an oscillator by the addition of a crystal with a resonant frequency equal to the particular frequency determined by the time delay. Suppression of unwanted oscillation frequencies is accomplished by adjusting a current source, which changes time delay, without using inductors or other reactive components.
    Type: Grant
    Filed: April 9, 1990
    Date of Patent: September 25, 1990
    Assignee: Motorola, Inc.
    Inventors: Robert J. Higgins, Jr., William J. Ooms, James S. Irwin