TREA

Frederick O. Johnson

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  • Monroeville, PA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Conveyor brake control
    • Patent number 4,664,247
    • Issue date May 12, 1987
    • Westinghouse Electric Corp.
    • Joachim E. Wolf
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    Method and apparatus for firing angle control of series connected t...
    • Patent number 4,639,851
    • Issue date Jan 27, 1987
    • Westinghouse Electric Corp.
    • Frederick O. Johnson
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Tachometer check apparatus
    • Patent number 4,575,664
    • Issue date Mar 11, 1986
    • Westinghouse Electric Corp.
    • Frederick O. Johnson
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Regulated DC power supply
    • Patent number 4,325,115
    • Issue date Apr 13, 1982
    • Westinghouse Electric Corp.
    • Frederick O. Johnson
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Converter apparatus
    • Patent number 4,286,315
    • Issue date Aug 25, 1981
    • Westinghouse Electric Corp.
    • Frederick O. Johnson
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    Converter apparatus
    • Patent number 4,277,825
    • Issue date Jul 7, 1981
    • Westinghouse Electric Corp.
    • Frederick O. Johnson
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    Elevator system
    • Patent number 4,258,829
    • Issue date Mar 31, 1981
    • Westinghouse Electric Corp.
    • Frederick O. Johnson
    • B66 - HOISTING LIFTING HAULING
  • Information Patent Grant

    Digital firing pulse generator for thyristor power converters
    • Patent number 4,017,744
    • Issue date Apr 12, 1977
    • Westinghouse Electric Corporation
    • Frederick O. Johnson
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Apparatus and method for reducing effective inductance in a dynamic...
    • Patent number 3,991,352
    • Issue date Nov 9, 1976
    • Westinghouse Electric Corporation
    • Warren C. Fry
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER