Patents by Inventor Robin D. Birch

Robin D. Birch 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).

  • Optical fiber having a helical core for sensing a magnetic field
    Patent number: 4949038
    Abstract: A sensor for sensing magnetic fields. A single mode optical fiber has a core which is wound into a helical shape. The fiber is formed with a former and a core, and the core is preferably attached to the inner surface of the former and wound into a helical shape tracing its inner periphery. The core is also offset from the central axis of the fiber former.
    Type: Grant
    Filed: April 5, 1989
    Date of Patent: August 14, 1990
    Assignee: National Research Development Corporation
    Inventors: Robin D. Birch, David N. Payne, Malcolm P. Varnham