TREA

Mark Johnston

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  • Macomb, IL, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Rotary hoe extension
    • Patent number 5,190,112
    • Issue date Mar 2, 1993
    • Yetter Manufacturing Company
    • Mark Johnston
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
  • Information Patent Grant

    Depth gauge wheel
    • Patent number 4,986,200
    • Issue date Jan 22, 1991
    • Yetter Manufacturing Company
    • Mark Johnston
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
  • Information Patent Grant

    Coulter and fertilizer applicator linkage arrangement
    • Patent number 4,947,770
    • Issue date Aug 14, 1990
    • Yetter Manufacturing Company
    • Mark Johnston
    • A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING