Patents by Inventor Yoong J. Choi

Yoong J. Choi 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).

  • Recessed illuminating apparatus
    Patent number: 5264994
    Abstract: A recessed illuminating apparatus has a fluorescent lamp horizontally arranged in a cylindrical body, a first reflecting plate having a wave shape is mounted on the body, and a second reflecting plate is mounted by a plurality of supporting members in an open portion at the lower portion of the body, whereby the reflecting efficiency is effectively increased. A plurality of sliding holes are formed in the side wall of the body, and a respective fastening member is inserted into each sliding hole and secures the body when the body is inserted into a recessed hole in a ceiling.
    Type: Grant
    Filed: January 31, 1992
    Date of Patent: November 23, 1993
    Inventor: Yoong J. Choi