Patents by Inventor Donald R. Hammer

Donald R. Hammer 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).

  • Building data transmission system
    Patent number: 4690491
    Abstract: An internal building data transmission system which uses optic fibers. It permits the flexible connection of work stations and equipment through the use of junction boxes, terminal boxes and distributing frames. The cables are connected by nonadhesive receptacles and are routed through the use of patch cord cables.
    Type: Grant
    Filed: October 4, 1985
    Date of Patent: September 1, 1987
    Assignee: Southwestern Bell Telephone
    Inventors: David E. Stein, Donald R. Hammer