Patents by Inventor John S. Duarte

John S. Duarte 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).

  • Double-locking assembly for sliding glass closures
    Patent number: 4142747
    Abstract: A double-locking assembly for sliding glass closures is described. The assembly uses a pair of locking rods which are moved axially to engage stops in a casing around the closure by a single-action rotation of a cammed actuator which is mounted on the frame surrounding the glass.
    Type: Grant
    Filed: August 29, 1977
    Date of Patent: March 6, 1979
    Inventors: Robert W. Beck, John S. Duarte