TREA

Timothy A. Bethke

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  • Apple Valley, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Muffler assembly and method of manufacture
    • Patent number 4,969,537
    • Issue date Nov 13, 1990
    • Donaldson Company, Inc.
    • Wayne M. Wagner
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Apparatus for coupling tubular members
    • Patent number 4,790,574
    • Issue date Dec 13, 1988
    • Donaldson Company, Inc.
    • Wayne M. Wagner
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
  • Information Patent Grant

    Method and apparatus for sound testing mufflers
    • Patent number 4,676,111
    • Issue date Jun 30, 1987
    • Donaldson Company, Inc.
    • Wayne M. Wagner
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Muffler apparatus and method for making same
    • Patent number 4,632,216
    • Issue date Dec 30, 1986
    • Donaldson Company, Inc.
    • Wayne M. Wagner
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
  • Information Patent Grant

    Clamp for exhaust system
    • Patent number 4,558,891
    • Issue date Dec 17, 1985
    • Donaldson Company, Inc.
    • Wayne M. Wagner
    • F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES