Patents by Inventor Chul S. Ahn

Chul S. Ahn 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).

  • Cassette storage case
    Patent number: 4235334
    Abstract: A tape cassette storage case is disclosed having hexagonal tape reel immobilization pillars and trapezoidal recesses for cradling a cassette and immobilizing the tape reels. Insertion of the cassette into the base of the case effectively immobilizes the tape reels without the need to close the case. When closed, the case affords effective protection from shock, dust and dirt.
    Type: Grant
    Filed: January 12, 1979
    Date of Patent: November 25, 1980
    Inventor: Chul S. Ahn