Patents by Inventor Dong B. Yang

Dong B. Yang 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: 5522406
    Abstract: An ash tray for eliminating the troublesome and insanitary work necessary to replace and clean it. The ash tray includes an ash box, a plurality of disposable ash pockets received in the ash box which are stacked one in another and means for extinguishing a cigarette which is disposed at a corner of the plurality of ash pockets. The extinguishing means may be integrally formed with or separated from the ash pocket.
    Type: Grant
    Filed: November 8, 1994
    Date of Patent: June 4, 1996
    Inventor: Dong B. Yang
  • Patent number: 5520196
    Abstract: A cigarette case equipped with a plurality of disposable ash receptacles. The cigarette case comprises an inner case for containing a pack of cigarettes, an inner cap covering an upper opening of the inner case, an ash receptacle consisting of a plurality of stacked sheet pockets such as silver paper pockets in which the inner case is inserted and which is formed at its upper portion with an ash inlet, a snap extinguishing member provided at a side of the inner case, an outer case for receiving the inner case, the ash receptacle and the snap extinguishing member which is formed at its upper portion with a cutout portion so as to open the ash inlet therethrough, an outer cap covering an upper opening of the outer case, and means for introducing ashes into the ash receptacle which is provided at the outer case.
    Type: Grant
    Filed: November 8, 1994
    Date of Patent: May 28, 1996
    Inventor: Dong B. Yang