Patents by Inventor Shevlin E. Ryan

Shevlin E. Ryan 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).

  • Power and control circuit for an electric door strike
    Patent number: 5654865
    Abstract: This invention discloses a versatile power and control circuit for an electric door strike that is operable in four different modes with readily adjustable release times. In addition, the invention is directed toward the provision of a highly efficient power supply that permits miniaturization and prevents overheating in the confined space that is available for installation in a door jamb.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: August 5, 1997
    Assignee: Hanchett Entry Systems, Inc.
    Inventor: Shevlin E. Ryan