Patents by Inventor Kiyoyuki Matsumoto

Kiyoyuki Matsumoto 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).

  • Device for rapid diagnosis of dental caries
    Patent number: 4582795
    Abstract: A method and device for rapid diagnosis of dental caries are provided in which a very small amount of saliva to be tested is impregnated into a test piece containing a dry reagent. The test piece is supported on a coating film, whereby the test piece can be maintained with the air intercepted to prevent evaporation of saliva for about 15-30 minutes at a temperature around 20.degree.-37.degree. C., and a color change of the reagent due to the enzymatic reaction of the dental caries-causing microorganism is examined.
    Type: Grant
    Filed: June 17, 1983
    Date of Patent: April 15, 1986
    Assignee: Showa Yakuhin Kako Co., Ltd.
    Inventors: Mutsumi Shibuya, Kiyoyuki Matsumoto