Patents by Inventor Ryu Su Sun

Ryu Su Sun 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).

  • Device which opens and closes the hub locker of a digital audio tape cartridge
    Patent number: 5198953
    Abstract: An improved digital audio tape cartridge has a pivotal lid with sidewalls formed to provide grooves which positively engage the jaws of wings of a tape reel hub locker so that the locked tape reel can be reliably released when the lid of the digital audio tape cartridge opens.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: March 30, 1993
    Assignee: SKC Limited
    Inventor: Ryu Su Sun
  • Lid locking device for tape cassette
    Patent number: 5084799
    Abstract: The present invention relates to a lid locking device for a video cassette having upper and lower cases and a lid mounted on the cases for movement between an open position and a closed position. The lid locking device comprises a lid lock having a pivot for mounting the lid lock within the upper and lower cases for pivotal movement between a lid locking position and a lid releasing position. The device further comprises a rounded groove in the upper side of a spring support member of the lid lock, a square projection on the lid lock comprising a convex portion, and a convex portion of the cassette at a point corresponding to the square projection.
    Type: Grant
    Filed: November 30, 1989
    Date of Patent: January 28, 1992
    Assignee: SKC Limited
    Inventors: Ryu Moo Yeol, Ryu Dae Ki, Yun Duk Kyun, An Jae Kyu, Hong Sun Kuk, Hong Chang Euy, Ryu Su Sun