Patents by Inventor John R. Lufkin

John R. Lufkin 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).

  • Engine overheat protection system
    Patent number: 4691669
    Abstract: A protection system for internal combustion systems which indicates and alarms the loss of coolant liquid which it detects as a pressure drop at higher temperatures, and then sets off an alarm.
    Type: Grant
    Filed: March 17, 1986
    Date of Patent: September 8, 1987
    Inventors: John H. Otteman, John R. Lufkin