Patents by Inventor Karl-Heinz Dummel

Karl-Heinz Dummel 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 for internal-combustion engine exhaust gases and method of assembly thereof
    Patent number: 5146052
    Abstract: A muffler housing consists essentially of two shell parts and is penetrated by pipes arranged between the shell parts. Fastening screws are inserted through the pipes into receiving holes at one of the shell parts and are accessible there.
    Type: Grant
    Filed: May 21, 1990
    Date of Patent: September 8, 1992
    Assignee: Friedrich Boysen GmbH & Co. KG
    Inventor: Karl-Heinz Dummel