Gas mask

Patents Grantslast 30 patents

  • Information Patent Grant

    Method of forming a custom mask using an impression mask

    • Patent number 6,464,924
    • Issue date Oct 15, 2002
    • W. Keith Thornton
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Fibrillated fibers and articles made therefrom

    • Patent number 5,192,604
    • Issue date Mar 9, 1993
    • American Cyanamid Company
    • Robert D. Giglia
    • A41 - WEARING APPAREL
  • Information Patent Grant

    Composite active filter material

    • Patent number 4,619,948
    • Issue date Oct 28, 1986
    • Twin Rivers Engineering
    • T. Scott Kennedy
    • A41 - WEARING APPAREL
  • Information Patent Grant

    1536857

    • Patent number 1,536,857
    • Issue date May 5, 1925
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
  • Information Patent Grant

    1325898

    • Patent number 1,325,898
    • Issue date Dec 23, 1919
    • B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL