Patents by Inventor Lloyd N. Johnson

Lloyd N. Johnson 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).

  • Control of rotor blade stroboscopic display
    Patent number: 4531408
    Abstract: The invention concerns method and apparatus to obtain accurate tracking of rotor blades, as for example helicopter rotor blades, despite the existence of conditions transiently altering rotor angular velocity.
    Type: Grant
    Filed: December 6, 1982
    Date of Patent: July 30, 1985
    Assignee: Chadwick-Helmuth Company, Inc.
    Inventors: James R. Chadwick, Lloyd N. Johnson