Patents by Inventor Kay Keith Richardson

Kay Keith Richardson 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).

  • Exhaust control method and apparatus
    Patent number: 3977493
    Abstract: An exhaust control method and apparatus for controlling the exhaust flow of an internal combustion engine to increase engine efficiency and power while suppressing the sound of the exhaust by both absorbing and canceling sound waves.
    Type: Grant
    Filed: November 1, 1973
    Date of Patent: August 31, 1976
    Inventor: Kay Keith Richardson