Patents by Inventor Jang Young HAN

Jang Young HAN 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).

  • Crank variable-speed gear device for increasing rotational power
    Patent number: 12195135
    Abstract: Disclosed is a crank variable-speed gear device (100) wherein the gear ratio can be increased to 1.6:1 to 1.8:1 through a gear assembly and a latch assembly, and the gear ratio can also be changed to 1:1, if necessary, thereby providing an excellent transmission efficiency, facilitating the manipulation thereof, and making it possible to provide a compact and lightweight bicycle.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: January 14, 2025
    Assignees: SPEEDTECH CO., LTD.
    Inventors: Jang Young Han, Dal Won Seo
  • CRANK VARIABLE-SPEED GEAR DEVICE FOR INCREASING ROTATIONAL POWER
    Publication number: 20220024540
    Abstract: Disclosed is a crank variable-speed gear device (100) wherein the gear ratio can be increased to 1.6:1 to 1.8:1 through a gear assembly and a latch assembly, and the gear ratio can also be changed to 1:1, if necessary, thereby providing an excellent transmission efficiency, facilitating the manipulation thereof, and making it possible to provide a compact and lightweight bicycle.
    Type: Application
    Filed: November 8, 2019
    Publication date: January 27, 2022
    Applicants: SPEEDTECH CO., LTD.
    Inventors: Jang Young HAN, Dal Won SEO