Patents by Inventor James L. Fielding

James L. Fielding 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).

  • Muffler with replaceable filters
    Patent number: 5135551
    Abstract: The invention relates to an improved muffler for an automobile that filters the exhaust and eliminates noise and odor as well as forces steam back into the engine to improve gas mileage. The muffler uses replaceable cartridges that serve as filters to divide the muffler into chambers that filter and eliminate the noise of the exhaust. Each filter can be removed and cleaned as the need arises.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: August 4, 1992
    Inventor: James L. Fielding