Patents by Inventor Roger Erwin

Roger Erwin 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).

  • Road vehicle braking system
    Publication number: 20040007913
    Abstract: A brake system is provided for a towing road vehicle attached to a towed road vehicle. An electric switch in the towing vehicle is electrically connected to one or more electrical pumps in the towed vehicle which are capable of increasing hydraulic pressure in the hydraulic brake system of the towed vehicle.
    Type: Application
    Filed: July 10, 2002
    Publication date: January 15, 2004
    Inventor: Roger Erwin