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Donald L. Olson

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  • Minneapolis, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Floor preparation machine and method
    • Patent number 4,768,311
    • Issue date Sep 6, 1988
    • Tennant Company
    • Donald L. Olson
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
  • Information Patent Grant

    Surface maintenance machine with rotary lip
    • Patent number 4,624,026
    • Issue date Nov 25, 1986
    • Tennant Company
    • Donald L. Olson
    • E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • Information Patent Grant

    Scrubber with foam and spray suppressor
    • Patent number 4,393,538
    • Issue date Jul 19, 1983
    • Tennant Company
    • Donald L. Olson
    • A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...