Patents by Inventor Marshall Stebbins Tisler

Marshall Stebbins Tisler 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).

  • Tunable antenna having adjustable loop configurations
    Patent number: 3950756
    Abstract: The antenna structure possesses a multi-sided configuration with means being provided for equally changing the lengths of at least two sides facing each other to thereby adjustably vary the physical size of the antenna. A parasitic reflector having a similar configuration and means for adjustability is positioned a predetermined distance behind the antenna proper for increasing the gain of the antenna structure.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: April 13, 1976
    Inventor: Marshall Stebbins Tisler