Patents by Inventor Ik-Byung Jang

Ik-Byung Jang 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).

  • Overdrive system for four-wheel bicycle
    Patent number: 7878520
    Abstract: Disclosed is an overdrive system for a bicycle, which increases the speed through use of a combination of a plurality of sprockets and ratchet wheels, and which drives with less power where a user steps on a pedal of a drive lever using the principle of a lever as overdrive generating means.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: February 1, 2011
    Inventor: Ik-Byung Jang
  • OVERDRIVE SYSTEM FOR FOUR-WHEEL BICYCLE
    Publication number: 20090283981
    Abstract: Disclosed is an overdrive system for a bicycle, which increases the speed through use of a combination of a plurality of sprockets and ratchet wheels, and which drives with less power where a user steps on a pedal of a drive lever using the principle of a lever as overdrive generating means.
    Type: Application
    Filed: December 16, 2008
    Publication date: November 19, 2009
    Inventor: Ik-Byung JANG