Patents by Inventor Choi K. Yeung

Choi K. Yeung 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).

  • Patent number: 5542531
    Abstract: A case for holding two compact discs or the like includes a front cover part (12), a rear cover part (14) and a carrier part (18). The front and rear cover parts are pivotally coupled along one wall of the case, and the carrier part is pivotally mounted between the cover parts near or at the above one edge of the case. The case when closed has approximately the same thickness as a standard single CD case. The carrier part has retaining tabs (44a, 44b) for retaining a compact disc adjacent each of two opposite faces (38, 40) of the carrier part. The front and rear cover parts may comprise the front and rear parts of a standard single CD case, with the conventional fixed CD carrying part omitted.
    Type: Grant
    Filed: December 17, 1993
    Date of Patent: August 6, 1996
    Assignee: Encore Holdings Limited
    Inventor: Choi K. Yeung
  • Patent number: 4716485
    Abstract: A cleaning apparatus for cleaning the heads of tape player/recorder units in which, when the cleaning apparatus is operably loaded into the unit, movement of a spindle of the unit turns a cleaning element positioned against the head. Transmission of the rotary movement of the spindle is achieved by a rotatably mounted drive connected to a cleaning element, such as a felt pad, so that as the spindle rotates, the cleaning element is rotated against the head about an axis substantially perpendicular to the plane of the face of the head of the unit. A tape drive cleaning assembly is included which cleans the pinch roller and capstan of the unit.
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: December 29, 1987
    Assignee: Recoton Corporation
    Inventor: Choi K. Yeung
  • Patent number: 4654917
    Abstract: Cleaning apparatus for a compact disc comprises a housing, a rotatable carrier disposed in the housing, a cleaning pad fastened to the carrier for contacting the surface of the compact disc, a drive wheel for driving the carrier to rotate the latter about an axis of rotation and concurrently to cause that axis of rotation to move along a predetermined path, and a constraint for constraining that path of movement to a curved path, whereby the carrier and its cleaning pad exhibit planetary movement of both rotation and revolution.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: April 7, 1987
    Assignee: Recoton Corporation
    Inventor: Choi K. Yeung