Patents by Inventor Andrew W. Ritchie

Andrew W. Ritchie 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).

  • Folding bicycles
    Patent number: 4182522
    Abstract: The present invention concerns a novel folding bicycle in which the rear wheel is mounted in a rear frame hinged to the main frame of the bicycle so that the rear frame can be folded beneath the bicycle. The main frame is also provided with a hinge and the handlebars fold downwardly. Special quick release clamps are also provided for the various folding parts.
    Type: Grant
    Filed: May 6, 1977
    Date of Patent: January 8, 1980
    Inventor: Andrew W. Ritchie