Patents by Inventor Mitsuru Nagatsuka

Mitsuru Nagatsuka 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).

  • Intercom
    Patent number: D820804
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: June 19, 2018
    Assignee: AIPHONE CO., LTD.
    Inventor: Mitsuru Nagatsuka
  • Intercom
    Patent number: D820805
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: June 19, 2018
    Assignee: AIPHONE CO., LTD.
    Inventor: Mitsuru Nagatsuka
  • Intercom
    Patent number: D869424
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: December 10, 2019
    Assignee: Aiphone Co., Ltd.
    Inventors: Kotaro Takahata, Mitsuru Nagatsuka