Patents by Inventor Keiiti Yamagishi

Keiiti Yamagishi 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).

  • Oral composition
    Patent number: 4469673
    Abstract: A dextranase containing-oral composition is made more stable and has a good feeling to use by incorporating therein carvone and l-menthol together at a weight ratio of 1:9 to 8:2, preferably in a combined amount of 0.1 to 5% by weight of the composition. The composition may be a dentifrice composition.
    Type: Grant
    Filed: February 5, 1981
    Date of Patent: September 4, 1984
    Assignee: Lion Corporation
    Inventors: Isao Iioka, Keiiti Yamagishi, Hiroshi Sato, Nobuo Suganuma