using only external forming surfaces

Patents Grantslast 30 patents

  • Information Patent Grant

    Cushioning conversion machine and method for converting stock mater...

    • Patent number 5,713,825
    • Issue date Feb 3, 1998
    • Ranpak Corp.
    • Richard O. Ratzel
    • B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
  • Information Patent Grant

    Duct forming machine

    • Patent number 5,186,704
    • Issue date Feb 16, 1993
    • Glass Master Corporation
    • Robert A. Cunningham
    • B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
  • Information Patent Grant

    Corrugating apparatus and process

    • Patent number 4,252,591
    • Issue date Feb 24, 1981
    • Pall Corporation
    • David J. Rosenberg
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    3495505

    • Patent number 3,495,505
    • Issue date Feb 17, 1970
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    3482491

    • Patent number 3,482,491
    • Issue date Dec 9, 1969
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    3304844

    • Patent number 3,304,844
    • Issue date Feb 21, 1967
    • B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
  • Information Patent Grant

    3195428

    • Patent number 3,195,428
    • Issue date Jul 20, 1965
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    2286529

    • Patent number 2,286,529
    • Issue date Jun 16, 1942
    • B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD
  • Information Patent Grant

    1693630

    • Patent number 1,693,630
    • Issue date Dec 4, 1928
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    1410745

    • Patent number 1,410,745
    • Issue date Mar 28, 1922
    • B31 - MAKING ARTICLES OF PAPER OR CARDBOARD WORKING PAPER OR CARDBOARD