Patents by Inventor Alfred Schiefen

Alfred Schiefen 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).

  • Patent number: 5195766
    Abstract: A bicycle having a frame to which is attached two wheels, the wheels being linked in such a manner that the application of the proper force results in substantial movement, or slowing of the motion, of the bicycle, more particularly for a bicycle having a suspension system which comprises a front fork, consisting of two fork tubes for fastening a wheel, a steering head and a handlebar stem connected to the steering head, whereby each fork tube consists of at least two tubes which can move in telescope fashion one inside the other, as well as at least one suspension element and a damping device.
    Type: Grant
    Filed: May 30, 1991
    Date of Patent: March 23, 1993
    Assignee: Boge AG
    Inventors: Wolfgang Dohrmann, Alfred Schiefen