Patents by Inventor Hsien-Chang Cheng

Hsien-Chang Cheng 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).

  • Sublimation process of transferring a decal to surface of a watch case
    Patent number: 6344103
    Abstract: A sublimation decalcomania of the surface of a watch case includes a first step in which the surface of the watch case is provided with a coating before the watch case and a decal-bearing paper are held in a plastic bag. The plastic bag containing the coated watch case and the decal-bearing paper is exhausted of air by a vacuum device. The vacuum bag is then baked in an oven to bring about the sublimation transfer of the decal to the coated surface of the watch case.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: February 5, 2002
    Inventors: Hsien-Chang Cheng, Stephen J. Petre