Patents by Inventor Tadahiko Oba

Tadahiko Oba 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).

  • System for preventing adhesion of marine organisms
    Patent number: 7303659
    Abstract: Plural composite panels are aligned in multiple horizontal rows. Each composite panel includes a titanium panel (anode), an electrical insulating member and a stainless-steel band member. The titanium panels (also, stainless-steel band members) of horizontally adjacent panels overlap each other to be in face-to-face contact. The stainless-steel band members are horizontally connected at different levels to form long negative electrodes (cathode) extending in seawater-flowing direction in an inlet channel. Each stainless-steel band member is exposed to seawater through a gap between vertically adjacent composite panels.
    Type: Grant
    Filed: September 14, 2005
    Date of Patent: December 4, 2007
    Assignees: Kabushiki Kaisha Toshiba, Tokyo Energy & Systems Inc.
    Inventors: Shuichi Inagaki, Liang Yan, Kenji Sato, Akira Nemoto, Yoshiharu Mikami, Nobuo Yamaga, Tadahiko Oba, Makoto Gomi, Takeo Shimazaki, Kouichi Furugaki, Kenji Kaneda
  • System for preventing adhesion of marine organisms
    Publication number: 20060054498
    Abstract: Plural composite panels are aligned in multiple horizontal rows. Each composite panel includes a titanium panel (anode), an electrical insulating member and a stainless-steel band member. The titanium panels (also, stainless-steel band members) of horizontally adjacent panels overlap each other to be in face-to-face contact. The stainless-steel band members are horizontally connected at different levels to form long negative electrodes (cathode) extending in seawater-flowing direction in an inlet channel. Each stainless-steel band member is exposed to seawater through a gap between vertically adjacent composite panels.
    Type: Application
    Filed: September 14, 2005
    Publication date: March 16, 2006
    Applicants: KABUSHIKI KAISHA TOSHIBA, Tokyo Energy & Systems Inc.
    Inventors: Shuichi Inagaki, Liang Yan, Kenji Sato, Akira Nemoto, Yoshiharu Mikami, Nobuo Yamaga, Tadahiko Oba, Makoto Gomi, Takeo Shimazaki, Kouichi Furugaki, Kenji Kaneda
  • Marine organism prevention system for structures in seawater
    Patent number: 6511586
    Abstract: An antifouling system (20) for a structure exposed to seawater has an anode forming member (4) bonded to the seawater-exposed surface to be wetted with seawater (15) of the structure via an insulating adhesive (6). The anode forming member 4 is coated with an electrical catalyst film 3 of an electrochemically active and stable electrical catalyst. A conductive member (8) is disposed so as to be wetted with seawater (15). An external dc power supply (7) has a positive terminal (7a) connected to the anode forming member (4) and a negative terminal (7b) connected to the conductive member (8). The external DC power supply (7) is provided with a built-in automatic potential controller (7c) that controls the potential difference between the positive terminal (7a) and the negative terminal (7b) such that oxygen can be generated in seawater suppressing the generation of chlorine in seawater.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: January 28, 2003
    Assignees: Kabushiki Kaisha Toshiba, Nakabohtec Corrosion Protecting Co., Ltd.
    Inventors: Shoji Nakashima, Shigeru Sakurada, Shuichi Inagaki, Tadahiko Oba, Hidetoshi Usui, Takahiro Kajiyama