TREA

Douglas S. Spencer

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  • St. Paul, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Nonwoven abrasive material roll
    • Patent number 6,207,246
    • Issue date Mar 27, 2001
    • 3M Innovative Properties Company
    • Louis S. Moren
    • D04 - BRAIDING LACE-MAKING KNITTING TRIMMINGS NON-WOVEN FABRICS
  • Information Patent Grant

    Abrasive articles and methods of making same
    • Patent number 5,551,961
    • Issue date Sep 3, 1996
    • Minnesota Mining and Manufacturing Company
    • Robbyn L. Engen
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Method of making a coated abrasive article
    • Patent number 5,368,618
    • Issue date Nov 29, 1994
    • Minnesota Mining and Manufacturing Company
    • Craig A. Masmar
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    Coated abrasive suitable for use as a lapping material
    • Patent number 4,773,920
    • Issue date Sep 27, 1988
    • Minnesota Mining and Manufacturing Company
    • Jonathan N. Chasman
    • B24 - GRINDING POLISHING