Patents by Inventor Jan L. Norman

Jan L. Norman 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).

  • Smoke alarm device for a grain dryer
    Patent number: 4177461
    Abstract: An alarm device for a grain dryer. The alarm device activating an audio alarm and visual alarm energized electrically by a smoke detector and burner shutdown indicator lamp to warn the dryer operator when a burner is no longer operating or when smoke is detected in the dryer.
    Type: Grant
    Filed: January 23, 1978
    Date of Patent: December 4, 1979
    Assignee: All Phase Electronics, Inc.
    Inventors: David A. Brown, Jan L. Norman, Donald W. Whitson