Patents by Inventor James D. Stifle

James D. Stifle 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).

  • Accessory for a garage door opener
    Patent number: 4064404
    Abstract: An accessory for a garage door opener which includes a circuit which is energized when the garage door operator is actuated and which can be used to energize a power circuit as, for example, a lamp so as to provide illumination upon energization of the garage door operator. The lamp automatically turns off after a pre-set time and can also be manually controlled by an on-off switch.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: December 20, 1977
    Assignee: Chamberlain Manufacturing Corporation
    Inventors: Colin Barns Willmott, James D. Stifle