Patents by Inventor William A. Barnstead

William A. Barnstead has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Sterilizer with sterile discharge
    Patent number: 5976474
    Abstract: A sterilizing machines for decontaminating articles of dangerous biological material features an arrangement whereby all of the gas discharged from the sterilizer chamber during a sterilization cycle passes through a removable filter situated within the sterilization chamber.
    Type: Grant
    Filed: June 25, 1998
    Date of Patent: November 2, 1999
    Inventor: William A. Barnstead