David D. Apfel

Person

  • Attica, MI, US

Patents Grantslast 30 patents

  • Information Patent Grant

    Expandable pre-formed plug

    • Patent number 7,011,315
    • Issue date Mar 14, 2006
    • L&L Products, Inc.
    • Michael J. Czaplicki
    • B62 - LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • Information Patent Grant

    Expandable pre-formed plug

    • Patent number 6,422,575
    • Issue date Jul 23, 2002
    • L&L Products, Inc.
    • Michael J. Czaplicki
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Patents Applicationslast 30 patents

  • Information Patent Application

    Expandable pre-formed plug

    • Publication number 20020096833
    • Publication date Jul 25, 2002
    • L&L Products, Inc.
    • Michael J. Czaplicki
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL