Patents by Inventor John A. McEwan

John A. McEwan 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).

  • Jump-proof electrical disenabling system
    Patent number: 4192400
    Abstract: The invention is an anti-theft system for motor vehicles and incorporates an electronic key which by virtue of a pre-coded shift register contained therein, and with the aid of an electronic clock contained within the vehicle can deliver this code as a series of impulses through a single output line to a decoder which is housed together with a disenabling gate inside the distributor or the starter motor casing to prevent circumvention of the electronic disenabling system.
    Type: Grant
    Filed: February 9, 1978
    Date of Patent: March 11, 1980
    Inventor: John A. McEwan