TREA

Dennis A. Kalgren

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  • Richardson, TX, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Roll-up door
    • Patent number 5,632,317
    • Issue date May 27, 1997
    • Overhead Door Corporation
    • LeRoy G. Krupke
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
  • Information Patent Grant

    Roll-up door
    • Patent number 5,601,133
    • Issue date Feb 11, 1997
    • Overhead Door Corporation
    • LeRoy G. Krupke
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS