TREA

Ralph L. Hendrickson

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  • Robbinsdale, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Drip irrigation emitter
    • Patent number 4,121,771
    • Issue date Oct 24, 1978
    • Ralph L. Hendrickson
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
  • Information Patent Grant

    Drip irrigation device
    • Patent number 3,968,930
    • Issue date Jul 13, 1976
    • Ralph L. Hendrickson
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING