Patents by Inventor Harold S. Duff

Harold S. Duff 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).

  • Armored optical fiber cable interconnection for dual payout systems
    Patent number: 5054868
    Abstract: An armored optical fiber cable interconnection and method of making the irconnection with a self-sealing, low-strength joint with relatively low optical attenuation, has an inner fiber carrying jacket, an outer protective jacket, and an intermediate armored jacket of stranded material. The interconnection ends are assembled with a doubled layer of armored jacket over an intermediate protective jacket portion all sealed and held in place with a length of shrink tubing over the jackets and a retaining bead with an o-ring fitting over the assembly and against the shrink tubing over the retaining bead.
    Type: Grant
    Filed: August 29, 1990
    Date of Patent: October 8, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Fay A. Hoban, Harold S. Duff, Andrew W. Marten