TREA

Calvin R. Rushford

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  • Reed City, MI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Collapsible revolving door
    • Patent number 4,688,350
    • Issue date Aug 25, 1987
    • Tubelite Division of Indall, Inc.
    • Marwan E. Hattem
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
  • Information Patent Grant

    Revolving door collapsing mechanism
    • Patent number 4,640,046
    • Issue date Feb 3, 1987
    • Indal, Inc.
    • Calvin R. Rushford
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES