TREA

Robert E. Johnson

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  • West Vancouver, CA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Injection capsule for treating trees
    • Patent number 4,854,074
    • Issue date Aug 8, 1989
    • Powertech Labs Inc.
    • Robert E. Johnson
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
  • Information Patent Grant

    Injection tool for treating trees
    • Patent number 4,848,028
    • Issue date Jul 18, 1989
    • Powertech Labs Inc.
    • Robert E. Johnson
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING