Patents by Inventor Chen-Kun J. Chang

Chen-Kun J. Chang 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).

  • Coin counter trough
    Patent number: 4545394
    Abstract: An elongated trough-like body has inclined sides deeper and wider than the largest coin handled having a grooved bottom with a radius larger than the largest coin handled enabling the unaligned coins to be shaken and formed into an aligned stack where their count is indicated by adjacent scales.
    Type: Grant
    Filed: September 30, 1983
    Date of Patent: October 8, 1985
    Inventor: Chen-Kun J. Chang