TREA

Robert P. Arens

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

  • Information Patent Grant

    Time-temperature integrating indicator device
    • Patent number 5,667,303
    • Issue date Sep 16, 1997
    • Minnesota Mining and Manufacturing Company
    • Robert P. Arens
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Article for use in forming a permanent image using a temporary marker
    • Patent number 5,389,426
    • Issue date Feb 14, 1995
    • Minnesota Mining and Manufacturing Company
    • Robert P. Arens
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Article capable of displaying defined images
    • Patent number 5,354,598
    • Issue date Oct 11, 1994
    • Minnesota Mining and Manufacturing Company
    • Robert P. Arens
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Reusable bingo card
    • Patent number 4,877,253
    • Issue date Oct 31, 1989
    • Minnesota Mining and Manufacturing Company
    • Robert P. Arens
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Imaging device
    • Patent number 4,729,687
    • Issue date Mar 8, 1988
    • Minnesota Mining and Manufacturing Company
    • Robert P. Arens
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Thermally-activated time-temperature indicator
    • Patent number 4,428,321
    • Issue date Jan 31, 1984
    • Minnesota Mining and Manufacturing Co.
    • Robert P. Arens
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Oil-repellent microvoid-imaging material
    • Patent number 4,374,889
    • Issue date Feb 22, 1983
    • Minnesota Mining and Manufacturing Company
    • Robert P. Arens
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Demand and timed renewing imaging media
    • Patent number 4,299,880
    • Issue date Nov 10, 1981
    • Minnesota Mining and Manufacturing Company
    • Robert P. Arens
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS