Patents Represented by Attorney Randall S. Vaas

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  • Device for use with a user interface card
    Patent number: 6118986
    Abstract: A compact portable communication device (100, 700, 900, 1500) has a first housing section (110, 707, 910) and a second housing section (112, 702, 1512). A mechanical connector (314) connects the housing sections such that they move between a closed storage position and an open use position. The housing sections each engage the removable user interface card when attached in the open use position. The communication device can operate in the closed storage position to receive pages and radiotelephone calls. The communication device (100, 700, 900, 1500) is opened to receive a call. When opened, a removable user interface card (300, 922, 1100) having a keypad (302) thereon, can be inserted. The keypad (302) is used to enter a telephone number for an outgoing call.
    Type: Grant
    Filed: January 16, 1998
    Date of Patent: September 12, 2000
    Assignee: Motorola, Inc.
    Inventors: Daryl Harris, Daniel L. Williams
  • System and method for calculating a state transition metric in a viterbi equalizer
    Patent number: 6111923
    Abstract: A system and method for calculating survivor metrics in a Viterbi equalizer of a receiver, such as a receiver operative to receive a PSK-modulated signal, for example, a .pi./4, differential, phase-shift-keying, modulated signal. The state transition metric, defined as a function of two successive states, is converted into a function defined by pairwise differences between allowable symbols of a PSK-modulated signal. When operative to receive the .pi./4 DQPSK-modulated signal, the number of calculations required to calculate state transition metrics is reduced significantly.
    Type: Grant
    Filed: February 13, 1996
    Date of Patent: August 29, 2000
    Assignee: Motorola, Inc.
    Inventors: Bruce Dale Mueller, David Edward Borth, Kevin Lynn Baum
  • Battery charger having moving door housing for a battery
    Patent number: 6049192
    Abstract: A battery charger includes a main housing (103). A well (108) in the main housing is for receipt of an electronic device (102) including a battery. A door housing (104) is movably carried on the main housing. At least one contact (422) is carried on the main housing for connection to a battery (200, 300) inserted between the door housing and the main housing, wherein the door housing is movable between an open position for receipt of a battery and a compact closed position. A circuit is positioned in the main housing for electrical connection to the electronic device and the contacts for charging a battery.
    Type: Grant
    Filed: March 18, 1999
    Date of Patent: April 11, 2000
    Assignee: Motorola, Inc.
    Inventors: Tony N. Kfoury, Jon Godston, Robert Hertlein, Andrew A. Powell
  • Communication method and device
    Patent number: 6047066
    Abstract: A system (100) and method of improving activation security allows a remote device (104) to identify that there is a difference between a first signal transmitted by a central site (102) and a first signal received by the remote device. A derived number is used. The derived number can be displayed to the user for verbal verification by the user, or the derived number can be used internally of the remote device, or the central site, for verification that is transparent to the user. A significant amount of security is added without substantially altering the communication protocol.
    Type: Grant
    Filed: August 10, 1998
    Date of Patent: April 4, 2000
    Assignee: Motorola, Inc.
    Inventors: Daniel Peter Brown, Louis David Finkelstein, Frank C. Pennypacker
  • Dual band amplifier
    Patent number: 6043721
    Abstract: An amplifier (104) for a dual band device includes multiple amplifier stages coupled between an input (103) and output (105). The amplifier stages include a first amplifier stage (200) having a first amplifier (206), a second amplifier stage (202) having a second amplifier, and a third amplifier stage (204) having a third amplifier (210). A first bypass (218) in said first amplifier stage provides a bypass for signals in a first frequency band. A second bypass (250) is provided in the third amplifier stage, the second bypass to provide for signals in a second frequency band a signal path that bypasses the third amplifier. Signals in the first and second frequency bands are amplified by the second amplifier.
    Type: Grant
    Filed: February 4, 1998
    Date of Patent: March 28, 2000
    Assignee: Motorola, Inc.
    Inventors: Thomas Dominic Nagode, Rashid Masood Osmani, Aamir Ali Abbasi
  • Silent call accept
    Patent number: 6018671
    Abstract: A remote device (102) includes a silent alert allowing the device to signal the user of an incoming call without an audible alert. The device further includes a key (119) actuated by the user to accept the call into a nonactive state. A prerecorded message is generated from a memory (126) and played for the calling party to inform the caller that the user is occupied, but will answer the call shortly. According to one aspect of the invention, the message can be periodically repeated, until the user places the call in an active call state. According to another aspect of the invention, the user can interrupt the message and enter the active call state at any time during the silent answer and hold subroutine.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: January 25, 2000
    Assignee: Motorola, Inc.
    Inventor: Erik Christian Bremer
  • Low profile eject stylus
    Patent number: 6014552
    Abstract: A low profile eject stylus (104) has an outer shell (402) and outer shell (404). The main shell is smaller than the outer shell whereby the main shell can slide within the outer shell. The outer shell has a cross sectional configuration such that it is larger in one direction (A) than it is in another direction (B) orthogonal to the one direction, such that the eject stylus has a low profile. A tip (406) fits within the main shell at an end opposite to the outer shell. The outer shell as assembled over at least a portion of a plunger (408). A spring (412) is coupled to the plunger to bias the stylus into a fully extended position. The stylus can be advantageously employed in a portable device (100) having a housing section (102) including an opening (103) for receipt of the stylus. Guide rails (302, 306) guide the stylus in the housing.
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: January 11, 2000
    Assignee: Motorola, Inc.
    Inventors: Christopher Aiken, Robert Stinauer
  • Dual card and method therefor
    Patent number: 6012634
    Abstract: A smart memory card (400, 900, 1000) communicates with a smartcard compatible device (500) and a memory card compatible device (600). The smart memory card includes a processor (402, 902, 1002) which performs smartcard functions and a memory (412, 912, 1004) for use with a memory card device connection which allows memory card compatible device operation. Cellular telephones (1300, 1600) facilitate the use of two types of cards therein.
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: January 11, 2000
    Assignee: Motorola, Inc.
    Inventors: Hugh Brogan, David Craig Schuster, Rafaele Pini
  • Mixed mode transceiver system
    Patent number: 6006104
    Abstract: A radiotelephone system comprised of a radiotelephone-pair suitably intercoupled theretogether to permit transfer of data, such as NAM information, therebetween. A first of the radiotelephone-pair comprises a radiotelephone of conventional construction. A second radiotelephone of the radiotelephone-pair comprises a radiotelephone having circuitry to transmit efficiently an information signal upon a cellular, communication system of increased capacity. The data sequence contained in the first radiotelephone is transferred to the second radiotelephone to permit a communication link to be formed between the second radiotelephone and a cellular, communication network.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: December 21, 1999
    Assignee: Motorola, Inc.
    Inventors: Michael P. Metroka, Joshua P. Kiem
  • Apparatus for infrared channel and method therefor
    Patent number: 5907418
    Abstract: An infrared channel includes an IR transmitter circuit (302) and an IR receiver circuit (304). The transmitter circuit encodes data packets (400) which include a precursor segment, a synchronization segment, and a data field, the data field including data words, which words are bytes of data encoded by adding ones complement data bits and interleaving data subfields. The data fields are for infrared emission by the light source. A receiver circuit processor (316 or 508) is coupled to input samples to detect the presence of a precursor during a predetermined time period, and sleeping for a time interval, between inputting samples, which is substantially longer than the predetermined time period. The transmitter circuit transmits the precursor for a period of time at least as long as the sleep interval.
    Type: Grant
    Filed: August 9, 1995
    Date of Patent: May 25, 1999
    Assignee: Motorola, Inc.
    Inventors: Thomas J. Walczak, Rachid Alameh, Sheila M. Rader
  • Clock driver
    Patent number: 5896054
    Abstract: A clock driver circuit (100) comprises an input (102) for a reference clock signal. A filter (106) is connected to the input to receive the reference signal and output a filtered signal. A complementary FET driver circuit (108) having a cross-over threshold is coupled to the filter to receive the filtered signal and output a conditioned clock signal.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: April 20, 1999
    Assignee: Motorola, Inc.
    Inventor: David M. Gonzalez
  • Communication device for different sized cards
    Patent number: 5894597
    Abstract: A communication device (100) includes a card reader (102). The card reader includes a card support (104) for a first sized subscriber card (101). The card reader also accommodates a second size card (108) between the card support and a contact assembly (106).
    Type: Grant
    Filed: September 24, 1996
    Date of Patent: April 13, 1999
    Assignee: Motorola, Inc.
    Inventors: Mark Schwartz, Gary Weiss
  • Display system and circuit therefor
    Patent number: 5867140
    Abstract: A display system includes a display panel (200) having a full display screen area (303) upon which images can be generated for viewing. An image control circuit (400, 501) controls the operation of the display panel such that only a partial display field, or area, (305) is controlled to generate images in a first operating mode to conserve power and the full display screen area is controlled to generate images in a second operating mode.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: February 2, 1999
    Assignee: Motorola, Inc.
    Inventor: Sheila M. Rader
  • Gain distribution circuit
    Patent number: 5867063
    Abstract: A system (100 or 200) includes a first AGC stage (102) having a programming input and a gain input. A second AGC stage (104 or 210 and 234) is coupled in a common path with the first AGC stage, the second AGC stage having a programming input and a gain input. The first and second AGC stages are programmed by respective programming signals to produce independent gain characteristics responsive to a common gain signal at their respective gain inputs.
    Type: Grant
    Filed: December 5, 1996
    Date of Patent: February 2, 1999
    Assignee: Motorola, Inc.
    Inventors: James Roderick Snider, David M. Gonzalez, Alexander Wayne Hietala
  • Method and converter for converting rectangular signals to phase signals
    Patent number: 5844943
    Abstract: A rectangular to phase converter (201) includes a first converter circuit (201B) which limits signals to a predetermined level. A phase selector (259) selects a relative phase from the limited signals. According to one aspect of the invention, input rectangular coordinate signals are mapped to the first quadrant in a first quadrant mapping circuit (201A) before the first quadrant signals are limited and the relative phase signal is returned to the original quadrant by an original quadrant mapping circuit (260).
    Type: Grant
    Filed: June 15, 1994
    Date of Patent: December 1, 1998
    Assignee: Motorola, Inc.
    Inventors: Henry L. Kazecki, John Diehl, Steven H. Goode
  • Portable radiotelephone
    Patent number: D411196
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: June 22, 1999
    Assignee: Motorola, Inc.
    Inventors: Nicholas Mischenko, Kenneth W. Carlson
  • Communication device
    Patent number: D411202
    Type: Grant
    Filed: March 17, 1998
    Date of Patent: June 22, 1999
    Assignee: Motorola, Inc.
    Inventors: Daniel J. Flanagan, III, Steve Gump, Albert L. Nagele
  • Charger
    Patent number: D412487
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: August 3, 1999
    Assignee: Motorola, Inc.
    Inventors: Albert L. Nagele, Kevin J. Schechtel
  • Portable telephone
    Patent number: D417449
    Type: Grant
    Filed: January 6, 1997
    Date of Patent: December 7, 1999
    Assignee: Motorola, Inc.
    Inventors: Daryl Robert Harris, Derek Edward Jensen, William Charles Phillips
  • Headphone jack assembly
    Patent number: D420008
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: February 1, 2000
    Assignee: Motorola, Inc.
    Inventors: Bradley Keith Lohrding, Daniel Williams, Teffy Chamoun