Patents by Inventor Frederick R. Siegfried

Frederick R. Siegfried 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).

  • Cable hanger
    Patent number: D263021
    Type: Grant
    Filed: January 31, 1978
    Date of Patent: February 16, 1982
    Assignee: Burlington Norther, Inc.
    Inventor: Frederick R. Siegfried