Patents by Inventor Douglas A. Norman

Douglas A. Norman 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).

  • Coaxial rotary coupler
    Patent number: 6064288
    Abstract: A coaxial rotary coupler assembly which includes a coaxial transmission region for transmitting RF energy between a stationary and rotating section of the rotary coupler. Compact stubs are associated with the input and output connections to associated input and output transmission lines. Stepped impedance chokes are formed between fixed and rotating portions of the outer and inner coaxial conductors of the rotary transmission line sections.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: May 16, 2000
    Assignee: L3 Communications Corp., Randtron Antenna Systems Division
    Inventors: Douglas A. Norman, James P. Scherer