Patents by Inventor Larry E. Shields

Larry E. Shields 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).

  • Tilt switch replacing mercury switches
    Patent number: 4820888
    Abstract: A tilt switch encapsulated by epoxy resin in a polyvinyl chloride housing for high strength is provided. Actuation of the tilt switch is effected when moved through an arc of 45.degree. or less.
    Type: Grant
    Filed: May 16, 1988
    Date of Patent: April 11, 1989
    Inventor: Larry E. Shields