Patents by Inventor Robert Karplus

Robert Karplus 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).

  • Interaction and relativity cart
    Patent number: 4068392
    Abstract: A vehicle for use as an educational toy to demonstrate elastic interaction and magnetic attraction and repulsion includes a vehicle body and wheels for movably supporting the body. A magnet is supported on the body at one end thereof and an elastic member is supported on the body at the opposite end thereof.
    Type: Grant
    Filed: September 28, 1976
    Date of Patent: January 17, 1978
    Assignee: Rand McNally & Company
    Inventors: Marshall A. Montgomery, Robert Karplus