Patents by Inventor Jack W. Dorfman

Jack W. Dorfman 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).

  • Ring binder
    Patent number: 3995961
    Abstract: A ring binder comprising a hollow spine divided into a stationary portion and a pair of movable portions integrally interconnected to one another through the intermediary of longitudinally extending scored folding lines. The two movable portions carry ring halves for movement toward and away from one another into closed and opened positions respectively. The movable portions are movable together with one another toward and away from the stationary portion into two extreme at-rest positions for opening and closing the ring halves.
    Type: Grant
    Filed: December 27, 1971
    Date of Patent: December 7, 1976
    Assignee: Jerome S. Serchuck
    Inventors: Robert S. Dorfman, Jack W. Dorfman