John K. Olthafer

Person

  • Platteville, WI, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Yieldable guide for a door

    • Patent number 6,574,832
    • Issue date Jun 10, 2003
    • Rite-Hite Holding Corporation
    • James C. Boerger
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS