Patents by Inventor Kwan B. Sim

Kwan B. Sim 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 bulge device for rotatable head drum
    Patent number: 5452169
    Abstract: A variable bulge device for displacing bulges of a rotation head drum, capable of adjusting a protruded amount of a bulge used, depending on a rotation speed of the rotating head drum and the kind of a tape used. The device includes an operating member partially protruded at one end thereof through a bulge hole formed at a lower drum of the rotation head drum, the operating member having a variable bulge provided by the protruded end, and a drive unit for driving the operating member and thereby adjusting the protruded amount and position of the variable bulge.
    Type: Grant
    Filed: March 14, 1994
    Date of Patent: September 19, 1995
    Assignee: Goldstar Co., Ltd.
    Inventors: Joong K. Joh, Soo K. Kim, Mun C. Joung, Ho W. Lee, Yoon S. Seoh, Seung I. Kim, Hyun K. Park, Kwan B. Sim, Weon K. Lee