Patents by Inventor Kozo Sibukawa

Kozo Sibukawa 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).

  • Digital slide caliper
    Patent number: D257009
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: September 23, 1980
    Assignee: Mitutoyo Mfg. Co., Ltd.
    Inventors: Kozo Sibukawa, Goro Nishikata
  • Dial caliper
    Patent number: D257010
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: September 23, 1980
    Assignee: Mitutoyo Mfg. Co., Ltd.
    Inventors: Kozo Sibukawa, Goro Nishikata
  • Combined digital and dial slide caliper
    Patent number: D257012
    Type: Grant
    Filed: May 16, 1979
    Date of Patent: September 23, 1980
    Assignee: Mitutoyo Mfg. Co., Ltd.
    Inventors: Kozo Sibukawa, Goro Nishikata
  • Combined digital and dial caliper
    Patent number: D257130
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: September 30, 1980
    Assignee: Mitutoyo Mfg. Co., Ltd.
    Inventors: Kozo Sibukawa, Goro Nishikata