Patents by Inventor Kazumi Oishi

Kazumi Oishi 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).

  • Toothbrush
    Patent number: 5799353
    Abstract: An object of the invention is to provide a toothbrush that effectively removes plaque attached to or deposited on all the regions of tooth surface, interdental space, and cervical margin, and to conduct efficient tooth brushing. To attain the object, at least one of a plurality of tufts constituting the tufting area is wide extending along the longitudinal direction of a tufting base, and the profile of the end portion of the wide tuft is converged toward the end in a shape of dot, line, or plane.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: September 1, 1998
    Assignee: Sunstar Inc.
    Inventors: Kazumi Oishi, Atsushi Yamamoto
  • Process for the preparation of aminothiadiazolylacetyl halide derivtives
    Patent number: 5428173
    Abstract: A process is provided for the preparation of an aminothiadiazolylacetyl halide derivative represented by the following formula (II): ##STR1## wherein R.sup.1 represents a lower alkyl, cycloalkyl or halogenated lower alkyl group; and R.sup.2 represents an amino-protecting group or a hydrogen atom, or a salt thereof, which process uses as the starting material a compound represented by the following formula (I): ##STR2## wherein R.sup.1 and R.sup.2 have the same meanings as defined above, or a salt thereof.
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: June 27, 1995
    Assignee: Eisai Chemical Co., Ltd.
    Inventors: Takeo Kanai, Akio Imai, Katsuhiko Sato, Homare Shinohara, Kazumi Oishi
  • Toothbrush
    Patent number: D359623
    Type: Grant
    Filed: August 4, 1994
    Date of Patent: June 27, 1995
    Assignee: Sunstar Kabushiki Kaisha
    Inventors: Atsushi Kinoshita, Kenji Sumiyama, Kazumi Oishi
  • Toothbrush
    Patent number: D383608
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: September 16, 1997
    Assignee: Sunstar Kabushiki Kaisha
    Inventors: Atsushi Yamamoto, Kazumi Oishi
  • toothbrush head
    Patent number: D387206
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: December 9, 1997
    Assignee: Sunstar Kabushiki Kaisha
    Inventors: Atsushi Yamamoto, Kazumi Oishi