Patents by Inventor David Francis Lovelace

David Francis Lovelace 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 waveguide couplers
    Patent number: 4082419
    Abstract: An optical directional coupler provides good guidance in the lateral direction by the use of projecting rib optical waveguide structure. One embodiment enables the use of sharper curves in the integrated optical circuitry with reduced optical loss.
    Type: Grant
    Filed: February 23, 1976
    Date of Patent: April 4, 1978
    Assignee: International Standard Electric Corporation
    Inventors: George Horace Brooke Thompson, David Francis Lovelace