TREA

David L. Ingalsbe

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  • Hastings, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Telephone-line powered coin telephone chassis
    • Patent number 5,907,606
    • Issue date May 25, 1999
    • Independent Technologies, Inc.
    • David L. Ingalsbe
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Electronic lock for coin telephones
    • Patent number 5,802,172
    • Issue date Sep 1, 1998
    • Independent Technologies, Inc.
    • David L. Ingalsbe
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Telecommunications test adapter
    • Patent number 5,393,235
    • Issue date Feb 28, 1995
    • Independent Technologies, Inc.
    • David L. Ingalsbe
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Test cord apparatus
    • Patent number 5,332,397
    • Issue date Jul 26, 1994
    • Independent Technologies, Inc.
    • David L. Ingalsbe
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Telecommunications test connector
    • Patent number D341815
    • Issue date Nov 30, 1993
    • Independent Technologies, Inc.
    • Dennis C. Blood
    • D13 - Equipment for production, distribution, or transformation of energy
  • Information Patent Grant

    Multiwire-pair telecommunications test system
    • Patent number 5,228,072
    • Issue date Jul 13, 1993
    • Independent Technologies, Inc.
    • Daryl E. Ingalsbe
    • G01 - MEASURING TESTING
  • Information Patent Grant

    Telecommunications cable tester
    • Patent number D335094
    • Issue date Apr 27, 1993
    • Independent Technologies, Inc.
    • Daryl E. Ingalsbe
    • D10 - Measuring, testing, or signalling instruments
  • Information Patent Grant

    Telephone loop tester
    • Patent number D318431
    • Issue date Jul 23, 1991
    • Independent Technologies, Inc.
    • Dennis C. Blood
    • D10 - Measuring, testing, or signalling instruments
  • Information Patent Grant

    Bix block adapter
    • Patent number 4,968,260
    • Issue date Nov 6, 1990
    • Independent Technologies, Inc.
    • David L. Ingalsbe
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    66 Block adapter
    • Patent number 4,925,393
    • Issue date May 15, 1990
    • Independent Technologies, Inc.
    • David L. Ingalsbe
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Line current test device
    • Patent number 4,912,755
    • Issue date Mar 27, 1990
    • Independent Technologies, Inc.
    • Dennis C. Blood
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    110 Block adapter
    • Patent number 4,878,848
    • Issue date Nov 7, 1989
    • Independent Technologies, Inc.
    • David L. Ingalsbe
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Ladder securing device
    • Patent number 4,792,016
    • Issue date Dec 20, 1988
    • Independent Technologies, Inc.
    • Daryl E. Ingalsbe
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Four pair cable test set
    • Patent number 4,703,497
    • Issue date Oct 27, 1987
    • Independent Technologies, Inc.
    • David L. Ingalsbe
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE