TREA

Frederic A. Longworth

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

  • Information Patent Grant

    Tape applying device
    • Patent number 5,456,422
    • Issue date Oct 10, 1995
    • Minnesota Mining and Manufacturing Company
    • Frederic A. Longworth
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Tape applying device
    • Patent number 5,269,871
    • Issue date Dec 14, 1993
    • Minnesota Mining and Manufacturing Company
    • Frederic A. Longworth
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Masking device with tape tracking member
    • Patent number 4,990,214
    • Issue date Feb 5, 1991
    • Minnesota Mining and Manufacturing Company
    • Robert H. Heil
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Blade guard
    • Patent number 4,989,769
    • Issue date Feb 5, 1991
    • Minnesota Mining and Manufacturing Company
    • Frederic A. Longworth
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Tape laminating device
    • Patent number 4,981,537
    • Issue date Jan 1, 1991
    • Minnesota Mining and Manufacturing Company
    • Robert H. Heil
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Masking machine
    • Patent number 4,915,769
    • Issue date Apr 10, 1990
    • Minnesota Mining and Manufacturing Company
    • Robert H. Heil
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Cut off blade for severing multiple layers of thin polymeric sheet...
    • Patent number 4,913,767
    • Issue date Apr 3, 1990
    • Minnesota Mining and Manufacturing Company
    • Frederic A. Longworth
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...