Patents by Inventor Richard E. Shank

Richard E. Shank 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).

  • Attic ventilation control system
    Patent number: 4251026
    Abstract: A control system for use with an attic ventilation fan operates to reduce heat buildup during the summer months and also to prevent frost buildup during the winter months by eliminating the cold, moisture-laden, air from the attic. A summer control unit is provided to eliminate the hot air and a winter control unit operates without the need of a humidistat to evacuate the moisture laden cold air during the winter months.
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: February 17, 1981
    Assignee: Butler Ventamatic Corp.
    Inventors: Howell T. Siegel, Jeffrey I. Siegel, Richard E. Shank