Patents by Inventor Fred R. Schwartzberg

Fred R. Schwartzberg 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).

  • Box truss hoop
    Patent number: 4475323
    Abstract: A box truss hoop which is defined by circumferentially adjacent collapsible boxes. The hoop is expandable radially from a compact, folded configuration to a deployed hoop configuration. Each of the boxes includes collapsible inner and outer frames, connecting side members extending between the inner and outer frames and diagonal braces. When employed as an antenna, the box truss hoop includes a shaped reflective surface extending across the hoop and a feed located at the focus of the reflective surface.
    Type: Grant
    Filed: April 30, 1982
    Date of Patent: October 9, 1984
    Assignee: Martin Marietta Corporation
    Inventors: Fred R. Schwartzberg, William H. Tobey