Patents by Inventor Hwa-Yang Tsay

Hwa-Yang Tsay 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: 4840441
    Abstract: A multi-function satchel which can be carried on the shoulder of the user when folded up, thus holding books, stationary and the like. It can also be opened up to a wide flat surface for writing, reading or drawing by placing the two cases of this satchel side-by-side with their lids pivotally opened to provide a larger area or a bookrest. In addition, a lamp and dry batteries may be provided in this satchel for illumination purposes.
    Type: Grant
    Filed: February 12, 1988
    Date of Patent: June 20, 1989
    Inventor: Hwa-Yang Tsay