Patents by Inventor Thomas H. Greenway

Thomas H. Greenway 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).

  • Broadband directional coupler
    Patent number: 4121180
    Abstract: A four port directional coupler using two substantially identical transformers, each transformer having a turn ratio N with a substantially pure resistive impedance across both of the transformer's secondary windings and a substantially pure resistive impedance connecting the transformer's primary windings, whereby the coupling coefficient, C, of the directional coupler is a function of the said resistive impedances and N and is substantially a continuous function of the values of said resistive impedances for any independently selected value of N.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: October 17, 1978
    Assignee: Technical Research and Manufacturing, Inc.
    Inventor: Thomas H. Greenway