Patents by Inventor Marshall P. Jepsen

Marshall P. Jepsen 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).

  • Combined internal combustion and steam engine
    Patent number: 4322950
    Abstract: My invention relates to internal combustion engines that are intermittently operated as steam engines with the changeover from one phase to the other controlled by the heat of the metal of the engine in the region of the combustion.
    Type: Grant
    Filed: September 22, 1980
    Date of Patent: April 6, 1982
    Inventor: Marshall P. Jepsen