Jack E. Zipf

Person

  • Columbus, OH, US

Patents Grantslast 30 patents

  • Information Patent Grant

    High security door locking device

    • Patent number 4,909,053
    • Issue date Mar 20, 1990
    • Liberty Telephone Communications, Inc.
    • Walter O. Zipf
    • E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES