Patents by Inventor Toji Mukai

Toji Mukai 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).

  • Patent number: 5320734
    Abstract: A test apparatus for measuring concentration of test solution, in which a thin sheet having a plurality of through holes and diffusion-limiting membranes to cover corresponding through hole, is movably installed, and one or two openings for deposition and a concentration measuring section are disposed in a thin sheet moving direction.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: June 14, 1994
    Assignee: Daikin Industries, Ltd.
    Inventors: Koichi Yamasaki, Tatsuhiko Osaka, Hitonaga Nakano, Toji Mukai, Yasuhiro Nagata, deceased, Sadaaki Nakaoka, Susumu Fujita, Yoichi Hamada
  • Patent number: 5228972
    Abstract: A disk-shaped thin plate or a long-sized thin plate having a roll appearance housed in a casing in which openings for penetration of test substance are formed and on which diffusion-limiting membranes are adhered to cover each openings. Also a driving mechanism for moving the thin plate is provided with the casing. The casing thus houses the thin plate and is provided with the driving mechanism and is positioned in a test apparatus body having a concentration measuring electrode therein. Multiple measurments of concentration of a test substance are carried out by moving the thin plate by the driving mechanism to position the diffusion-limiting membrane having the test solution deposited thereon to the position available to contact with the concentration measuring electrode, while keeping the casing placed in the test apparatus body. As a result, a plurality of measurements of concentration of the test substance is carried out easily.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: July 20, 1993
    Assignee: Daikin Industries, Ltd.
    Inventors: Tatsuhiko Osaka, Koichi Yamasaki, Hiroshi Terawaki, Toji Mukai, Sadaaki Nakaoka, Harumi Tanaka, Yoichi Hamada
  • Patent number: 4933066
    Abstract: An apparatus for mounting a diffusion-limiting membrane for a sensor in which a mounting member for mounting a diffusion-limiting membrane holding plate is movable toward and away from an enzyme electrode unit and in which, with the mounting member positioned away from the enzyme electrode unit, a diffusion-limiting membrane holding plate having a diffusion-limiting membrane mounted thereon is mounted on or removed from the mounting member, thus preventing the diffusion-limiting membrane from being slidingly rubbed with the surface of the enzyme electrode and in which, with the holding plate mounted on the mounting member, the mounting member ius moved toward the enzyme electrode unit, causing the diffusion-limiting membrane to be stuck to the surface of the enzyme electrode unit.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: June 12, 1990
    Assignee: Daikin Industries, Ltd.
    Inventors: Tatsuhiko Osaka, Hiroshi Terawaki, Toji Mukai, Koichi Yamasaki
  • Patent number: 4578693
    Abstract: In a semiconductive photodetector device having a semiconductor substrate and a plurality of photodiodes juxtaposed in one major surface of the semiconductor substrate, exposed edges of adjacent pn junctions of adjacent photodiodes are covered with a polysilicon film.
    Type: Grant
    Filed: June 17, 1983
    Date of Patent: March 25, 1986
    Assignee: Hitachi, Ltd.
    Inventors: Yoshiaki Yazawa, Nobuaki Miyakawa, Toji Mukai, Takahide Ikeda, Tatsuya Kamei
  • Patent number: 4242695
    Abstract: A photo-semiconductor device includes an active region of semiconductor material in which carriers contributing to a photocurrent are generated by the irradiation of incident light. On one surface of the active region is formed a main junction towards which those carriers move. In the active region is buried an additional region to form at the interface between the additional and active regions an additional junction which attracts a substantial portion of thermally generated carriers. The remaining portion of the thermally generated carriers is partially recombined internally and partially attracted to the main junction. Thus, dark current is reduced.
    Type: Grant
    Filed: January 26, 1979
    Date of Patent: December 30, 1980
    Assignee: Hitachi, Ltd.
    Inventors: Hirobumi Ouchi, Toji Mukai