by punching spacers

Patents Grantslast 30 patents

  • Information Patent Grant

    3789480

    • Patent number 3,789,480
    • Issue date Feb 5, 1974
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    3777371

    • Patent number 3,777,371
    • Issue date Dec 11, 1973
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    2515487

    • Patent number 2,515,487
    • Issue date Jul 18, 1950
    • H01 - BASIC ELECTRIC ELEMENTS