Patents by Inventor Jyh-Perng Jean

Jyh-Perng Jean 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).

  • Patent number: 4841728
    Abstract: A straight through type muffler for generating an exhaust flow from an internal combustion engine includes a closed expansion chamber in communication with the straight through passage of the muffler. A minority of the gases passing through the straight through passage will be accumulated in the expansion chamber and will be returned to the straight through passage when the pressure of the gases passing through the straight through passage is reduced, thereby minimizing the back pressure from the muffler.
    Type: Grant
    Filed: July 10, 1987
    Date of Patent: June 27, 1989
    Assignee: Jyh-Jian Jean
    Inventors: Jyh-Jian Jean, Jyh-Perng Jean