Patents by Inventor Dan-Chern Tsao

Dan-Chern Tsao 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).

  • Multi-functional stationery tool combination
    Patent number: 4783867
    Abstract: A multi-functional tool combination has a top and bottom casing and guiding plate which forms a compartment for the arrangement of a pair of scissors, a measuring tape, a stapler, a paper punch, a pencil sharpener, a blade etc. These stationery tools are adapted for convenient use, and the combination is compact so that it can be easily carried.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: November 15, 1988
    Inventor: Dan-Chern Tsao