Lawrence D. Johnson

Person

  • Rockford, IL, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Self-tapping or thread-forming screw

    • Patent number 4,104,446
    • Issue date Aug 1, 1978
    • Keystone Consolidated Industries, Inc.
    • Lawrence D. Johnson
    • B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...