Patents by Inventor Karel Novotny

Karel Novotny 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).

  • Variable transmission gear, particularly for bicycles
    Patent number: 4772250
    Abstract: Variable transmission gear particularly for bicycles comprising a transmission element such as a chain or a belt which is in engagement with a driving and a driven rosette, one rosette consisting of two parts adapted to be mutually shifted along straight guidings, the axis of said guidings being parallel and passing beyond the axis of supporting shaft.
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: September 20, 1988
    Assignee: Kovodruzstvo Mlada Boleslav, Vyrobni Druzstvo
    Inventors: Josef Kovar, Karel Novotny, Pavel Wallensfels, Jiri Snizek, Rudolf Sida, Petr Pavlata