Patents by Inventor Norman L. Seigel

Norman L. Seigel 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).

  • Filter monitor
    Patent number: 6711525
    Abstract: An apparatus for monitoring filter use in a compressed air system and indicating when filter element renewal is required on a differential pressure cost basis.
    Type: Grant
    Filed: April 30, 2002
    Date of Patent: March 23, 2004
    Assignee: Pneumatic Products Corporation
    Inventors: Tim Fox, Norman L. Seigel