Patents by Inventor Walter Friedopfer

Walter Friedopfer 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).

  • Eyeglass retainer
    Patent number: 4541696
    Abstract: An eyeglass retainer comprising a tubular elastic knit cord made adjustable by sliding the temple pieces of eyeglasses into the tubular ends of the cord. The cord is a unitary piece.
    Type: Grant
    Filed: March 21, 1983
    Date of Patent: September 17, 1985
    Inventors: Irwin Winger, Walter Friedopfer