TREA

Harold Jack Greenspan

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  • Los Angeles, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Abrasive member
    • Patent number 4,114,322
    • Issue date Sep 19, 1978
    • Harold Jack Greenspan
    • B28 - WORKING CEMENT, CLAY, OR STONE
  • Information Patent Grant

    Fluted diamond drill
    • Patent number 4,083,351
    • Issue date Apr 11, 1978
    • Harold Jack Greenspan
    • B28 - WORKING CEMENT, CLAY, OR STONE