Patents by Inventor Keiji Takagaki

Keiji Takagaki 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).

  • Ventilation fan
    Patent number: D702827
    Type: Grant
    Filed: January 17, 2013
    Date of Patent: April 15, 2014
    Assignee: Panasonic Corporation
    Inventors: Nobuyuki Mase, Keiji Takagaki
  • Ventilating fan
    Patent number: D865153
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: October 29, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Keiji Takagaki, Nobuyuki Mase
  • Ventilating fan
    Patent number: D865154
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: October 29, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Keiji Takagaki, Nobuyuki Mase
  • Ventilating fan
    Patent number: D865155
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: October 29, 2019
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Keiji Takagaki, Nobuyuki Mase