TREA

David B. Parkinson

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  • Cleveland Heights, OH, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method of manufacturing battery plates
    • Patent number 4,192,049
    • Issue date Mar 11, 1980
    • Gould Inc.
    • David B. Parkinson
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Composite battery plate grid
    • Patent number 4,134,192
    • Issue date Jan 16, 1979
    • Gould Inc.
    • David B. Parkinson
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Battery plate and methods of manufacture
    • Patent number 4,121,023
    • Issue date Oct 17, 1978
    • Gould Inc.
    • David B. Parkinson
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Machine for making expanded metal
    • Patent number 3,987,520
    • Issue date Oct 26, 1976
    • Gould Inc.
    • David B. Parkinson
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Machine for making expanded metal
    • Patent number 3,987,521
    • Issue date Oct 26, 1976
    • Gould Inc.
    • David B. Parkinson
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Machine for making expanded metal
    • Patent number 3,965,550
    • Issue date Jun 29, 1976
    • Gould Inc.
    • David B. Parkinson
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...