Patents Assigned to Infinity Systems, Inc.
  • Switching amplifier
    Patent number: 5218315
    Abstract: An improved digital switching amplifier is disclosed. The amplifier utilizes a low-pass filter at the input of the switching comparator to give an improved signal to noise ratio at the final output. In another aspect of the invention, a propagation delay is used to produce the steady-state oscillation of the amplifier circuit.
    Type: Grant
    Filed: January 6, 1992
    Date of Patent: June 8, 1993
    Assignee: Infinity Systems, Inc.
    Inventor: Wheeler Mc. Turner
  • Docking amplifier housing assembly
    Patent number: 5130891
    Abstract: An amplifier housing assembly particularly useful for automobile stereo systems is disclosed. The assembly comprises a mounting plate which bolts to a stationary surface and an amplifier enclosure which mounts on the mounting plate. Wires from speakers and a power source are connected to the mounting plate which are then connected to the amplifier when the amplifier housing is mounted on the mounting plate by means of male and female connectors. An antitheft feature of the housing is that the mounting bolts of the mounting plate are rendered inaccessible when amplifier enclosure is mounted on the mounting plate.
    Type: Grant
    Filed: January 2, 1991
    Date of Patent: July 14, 1992
    Assignee: Infinity Systems, Inc.
    Inventor: Cary L. Christie
  • Tone arm
    Patent number: D251558
    Type: Grant
    Filed: March 31, 1977
    Date of Patent: April 10, 1979
    Assignee: Infinity Systems, Inc.
    Inventors: Cary L. Christie, Makoto Ikeda
  • Audio amplifier housing
    Patent number: D327072
    Type: Grant
    Filed: December 31, 1990
    Date of Patent: June 16, 1992
    Assignee: Infinity Systems, Inc.
    Inventor: Cary L. Christie
  • Speaker
    Patent number: D328462
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: August 4, 1992
    Assignee: Infinity Systems, Inc.
    Inventor: Cary L. Christie
  • Combined speaker and stand therefor
    Patent number: D328898
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: August 25, 1992
    Assignee: Infinity Systems, Inc.
    Inventor: Cary L. Christie
  • Speaker
    Patent number: D328899
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: August 25, 1992
    Assignee: Infinity Systems, Inc.
    Inventor: Cary L. Christie
  • Speaker
    Patent number: D336475
    Type: Grant
    Filed: June 4, 1990
    Date of Patent: June 15, 1993
    Assignee: Infinity Systems, Inc.
    Inventor: Cary L. Christie
  • Speaker cabinet
    Patent number: D340930
    Type: Grant
    Filed: April 26, 1991
    Date of Patent: November 2, 1993
    Assignee: Infinity Systems, Inc.
    Inventor: Cary L. Christie
  • Amplifier housing
    Patent number: D343838
    Type: Grant
    Filed: December 18, 1991
    Date of Patent: February 1, 1994
    Assignee: Infinity Systems, Inc.
    Inventors: Brett M. Frank, Kim L. Christie
  • Speaker cabinet
    Patent number: D344951
    Type: Grant
    Filed: December 19, 1991
    Date of Patent: March 8, 1994
    Assignee: Infinity Systems, Inc.
    Inventor: Cary L. Christie