Patents by Inventor Peter John McManus

Peter John McManus 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).

  • Internal combustion engine variable tuned exhaust system
    Patent number: 5678404
    Abstract: An exhaust system for an internal combustion engine having an exhaust port and an exhaust chamber communicating between the ports includes a variable dimension element in the exhaust chamber adapted to vary an effective dimension of the exhaust chamber during operation of the engine.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: October 21, 1997
    Inventor: Peter John McManus