Patents by Inventor Masatoshi Doi

Masatoshi Doi 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).

  • Thermometer
    Patent number: D502414
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: March 1, 2005
    Assignee: Combi Corporation
    Inventors: Fumie Shibata, Yuuki Shibata, Masatoshi Doi, Yuko Inomata
  • Bath chair for infant
    Patent number: D489538
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: May 11, 2004
    Assignee: Combi Corporation
    Inventors: Fumie Shibata, Yuuki Shibata, Keita Tanaka, Masatoshi Doi, Yuko Inomata
  • Child fork
    Patent number: D491420
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: June 15, 2004
    Assignee: Combi Corporation
    Inventors: Fumie Shibata, Yuuki Shibata, Masatoshi Doi, Makoto Oyama
  • Toilet trainer
    Patent number: D491645
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: June 15, 2004
    Assignee: Combi Corporation
    Inventors: Fumie Shibata, Yuuki Shibata, Keita Tanaka, Masatoshi Doi, Kazumi Minoguchi
  • Potty
    Patent number: D491646
    Type: Grant
    Filed: May 8, 2003
    Date of Patent: June 15, 2004
    Assignee: Combi Corporation
    Inventors: Fumie Shibata, Yuuki Shibata, Keita Tanaka, Masatoshi Doi, Kazumi Minoguchi
  • Baby baths
    Patent number: D498827
    Type: Grant
    Filed: May 5, 2003
    Date of Patent: November 23, 2004
    Assignee: Combi Corporation
    Inventors: Fumie Shibata, Yuuki Shibata, Keita Tanaka, Masatoshi Doi, Yuko Inomata
  • Baby stroller
    Patent number: D308656
    Type: Grant
    Filed: March 10, 1988
    Date of Patent: June 19, 1990
    Assignee: Combi Co., Ltd.
    Inventors: Takehiko Takahashi, Hitoshi Katou, Masatoshi Doi, Tomihiro Kaneko