TREA

Gerald E. Williamson

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  • Ankeny, IA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Field cultivator shank
    • Patent number 4,261,423
    • Issue date Apr 14, 1981
    • Koehring Company
    • Gerald E. Williamson
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
  • Information Patent Grant

    Silage unloader
    • Patent number 3,985,305
    • Issue date Oct 12, 1976
    • Koehring Company
    • Gerald E. Williamson
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING