Patents by Inventor Takumi Hirakawa

Takumi Hirakawa 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).

  • Analysis apparatus and analysis method
    Patent number: 9638729
    Abstract: Provided are an analysis apparatus and an analysis method which are capable of recognizing a local state change of an internal structure of a secondary battery. The analysis apparatus includes: an observation cell that houses a secondary battery; a charging and discharging controller that controls charging and discharging of the secondary battery; an image pickup device that captures color images of the secondary battery at a predetermined time interval; and a charging and discharging data detection unit that acquires charging and discharging data on the secondary battery during charging and discharging. Color image signals output from the image pickup device and charging and discharging data signals output from the charging and discharging data detection unit are supplied to a signal processing device. The signal processing device outputs a unit that temporally links time-series color image signals and time-series charging and discharging data signals, and designated analysis data.
    Type: Grant
    Filed: November 11, 2013
    Date of Patent: May 2, 2017
    Assignee: LASERTEC CORPORATION
    Inventors: Hiroyuki Maekawa, Yoshihiro Nishimura, Seiji Morishita, Hisahiro Yamaoka, Takumi Hirakawa, Makoto Yonezawa
  • ANALYSIS APPARATUS AND ANALYSIS METHOD
    Publication number: 20140136132
    Abstract: Provided are an analysis apparatus and an analysis method which are capable of recognizing a local state change of an internal structure of a secondary battery. The analysis apparatus includes: an observation cell that houses a secondary battery; a charging and discharging controller that controls charging and discharging of the secondary battery; an image pickup device that captures color images of the secondary battery at a predetermined time interval; and a charging and discharging data detection unit that acquires charging and discharging data on the secondary battery during charging and discharging. Color image signals output from the image pickup device and charging and discharging data signals output from the charging and discharging data detection unit are supplied to a signal processing device. The signal processing device outputs a unit that temporally links time-series color image signals and time-series charging and discharging data signals, and designated analysis data.
    Type: Application
    Filed: November 11, 2013
    Publication date: May 15, 2014
    Applicant: Lasertec Corporation
    Inventors: Hiroyuki MAEKAWA, Yoshihiro NISHIMURA, Seiji MORISHITA, Hisahiro YAMAOKA, Takumi HIRAKAWA, Makoto YONEZAWA
  • Surveying apparatus utilizing a laser beam
    Patent number: D363240
    Type: Grant
    Filed: April 25, 1994
    Date of Patent: October 17, 1995
    Assignee: Sokkia Co., Ltd.
    Inventors: Takumi Hirakawa, Hiroyuki Tsuchikane, Yuichi Ohashi, Hidekazu Yamamuro, Shigeyuki Sawaguchi
  • Surveying apparatus utilizing a laser beam
    Patent number: D383075
    Type: Grant
    Filed: October 4, 1995
    Date of Patent: September 2, 1997
    Assignee: Sokkia Co., Ltd.
    Inventors: Shigeyuki Sawaguchi, Takenori Ryouke, Takumi Hirakawa, Jiang Yin, Hiroyuki Nakabe, Shunji Yamagata, Yukiko Chiba