Patents by Inventor Hirofumi Suzuki

Hirofumi Suzuki 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: 5306443
    Abstract: By the selective use of a homogeneous stable precursor solution in which no polymerization reactions immediately occur and which contains aromatic compounds such as pyrrole, thiophene, aromatic amines or their derivatives, oxidizing agents, and solvents, as a precursor solution of conductive polymer film, a homogeneous and tough conductive polymer film can be obtained when the said precursor solution is cast on a substrate and the solvents are evaporated to remove.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: April 26, 1994
    Assignee: Nippon Soda Co., Ltd.
    Inventors: Takehira Kaneko, Hirofumi Suzuki, Nobuo Matsui, Tomio Yagihara, Shiro Higashida, Akira Nakada, Hitoshi Matsumoto, Takeo Shimizu
  • Patent number: 5278295
    Abstract: A pyrrole polymer membrane having electrical conductivity and liquid crystal properties in the same matrix. The starting pyrrole monomer derivative is illustrated by the formula ##STR1## where R.sub.1 and R.sub.2 are selected so that at least either of them is an electron attractive group. Methods of producing such membranes by a electropolymerization process and by a chemical oxidation process are described.
    Type: Grant
    Filed: May 7, 1992
    Date of Patent: January 11, 1994
    Assignee: Nippon Soda Co., Ltd.
    Inventors: Hirofumi Suzuki, Takehira Kaneko, Nobuo Matsui, Isami Hamamoto, Tetsuya Katoh, Toshiaki Satoh, Fuminiko Nagasaki
  • Patent number: 5133613
    Abstract: A printing head includes solenoids arranged in an annular array for driving needles which are arranged in a zigzag array of two vertical columns. Solenoids corresponding to needles forming one of the columns are arranged on a semicircle of the annular array in the same order as that of the needles on the needle column. Two solenoids respectively corresponding to needles disposed at lower ends of the two needle columns are designed to generate magnetic fluxes whose directions are the same. During underline printing where these two solenoids are alternately energized, the magnetic flux generated by one of the solenoids never acts to increase an effective magnetic flux of the other solenoid at an initial stage of the excitation period thereof, so that the needle of the first solenoid reaches its forwardmost position at an appropriate time. The needle is rapidly restored and its tip prevented from being caught by the ink ribbon.
    Type: Grant
    Filed: August 21, 1990
    Date of Patent: July 28, 1992
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Tsutomu Ikehata, Hirofumi Suzuki, Katsuya Masuda, Makoto Yasunaga, Yoshimasa Tai
  • Patent number: 5132820
    Abstract: There are disclosed various types of TFT active matrix liquid crystal display devices in which a pixel is divided into three parts, a capacitor is added to each pixel, light shielding is applied to each TFT, and the matrix is driven by a DC cancelling technique.
    Type: Grant
    Filed: June 10, 1988
    Date of Patent: July 21, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Sakae Someya, Ryuuzoh Nashimoto, Hirofumi Suzuki, Katsuhiko Yarita, Shinji Matsumoto, Akira Sasano, Hideaki Taniguchi, Ryouji Oritsuki
  • Patent number: 5102245
    Abstract: A print head for a dot printer having a plurality of needles for printing by projecting the needles selectively from the print head. The print head has a solenoid base having a plurality of solenoids arranged in a circle thereon for driving the needles, a heat conductor having one side fixed in heat conducting relationship to one surface of the solenoid base and having a heat radiating portion extending in one direction from the solenoid base for radiating heat conducted thereto from the solenoid base, and a connecting portion extending in another direction from the solenoid base, a printed circuit board mounted on the side of the heat conductor opposite the one side, and an electrical connector for receiving a cable for supplying signals to a circuit on the printed circuit board and mounted on the connecting portion and electrically connected to the circuit on the printed circuit board.
    Type: Grant
    Filed: August 27, 1990
    Date of Patent: April 7, 1992
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Tsutomu Ikehata, Makoto Yasunaga, Katsuya Masuda, Hirofumi Suzuki
  • Patent number: 5032536
    Abstract: There is disclosed a liquid crystal color display of the active matrix type. A method of fabricating the display is initiated by depositing a transparent conductive material of indium tin oxide (ITO) as a thin layer onto a glass plate. Then chromium is deposited as an opaque film onto the ITO layer. The two layers are selectively removed, using a first mask pattern. A layer of an insulator consisting of Si.sub.3 N.sub.4 is deposited on the laminate within a reducing atmosphere of plasma. An I-type amorphous silicon layer is formed on the insulator layer. A highly doped N-type amorphous silicon layer is then formed. The N-type silicon layer, the I-type silicon layer, and the silicon nitride layer are selectively removed. An aluminum layer is formed on the laminate and then selectively etched away. Finally, the chromium layer is selectively etched away to form gates, gate leads, pixel electrodes, sources, drains and drain leads.
    Type: Grant
    Filed: March 14, 1989
    Date of Patent: July 16, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Ryouji Oritsuki, Masateru Wakui, Hirofumi Suzuki
  • Patent number: 5013169
    Abstract: An improved print head for a dot matrix printer is provided. The printing is performed by wires projecting from said print head. The movement of the wires is controlled by the movement of armatures which contact an armature base. The construction of the base from a liquid crystal polymer or an aromatic series polyester resin results in improved vibration damping which in turn results in quieter printer operation.
    Type: Grant
    Filed: August 16, 1989
    Date of Patent: May 7, 1991
    Assignee: Citizen Watch Company, Ltd.
    Inventors: Tsutomu Ikehata, Makoto Yasunaga, Hirofumi Suzuki
  • Patent number: 4829029
    Abstract: A low temperature sintering ceramic material, having low temperature sinterability and excellent thermal conductivity, is particularly suitable for use in making an IC substrate of a ceramic printed plate board. This low temperature sintering ceramic material has two composition types. One is a binary composition type ceramic material consisting essentially of MgO and B.sub.2 O.sub.3, and the other is a ternary composition type ceramic material composed of principal components consisting of MgO and B.sub.2 O.sub.3 and assisting components consisting of one or more selected from Li.sub.2 O, Na.sub.2 O, K.sub.2 O, a fluoride of an alkali metal and a fluoride of an alkaline earth metal. After sintering, MgO and B.sub.2 O.sub.3 are respectively contained at 50 to 90 mol% and 10 to 50 mol% on 100 mol% of the total amount of MgO and B.sub.2 O.sub.3.
    Type: Grant
    Filed: September 1, 1987
    Date of Patent: May 9, 1989
    Assignee: Nippondenso Co., Ltd.
    Inventors: Nobuaki Kawahara, Hiroki Hoshizaki, Hirofumi Suzuki, Kiyomi Kobayashi, Makoto Ohkawa, Mitsuru Asano
  • Patent number: 4803345
    Abstract: A ceramic heater body is formed in a plate shape, and has electrode attaching portions at both ends of the heater body. A plurality of openings are formed in the electrode attaching portion, and a metallized layer is formed on the inner peripheral surface of each of the openings. Electrodes having a plurality of wires are connected to the electrode attaching portions, for supplying power to the heater body. The metal wires are inserted into the openings formed having the metallized layers on the inner peripheral surfaces, and are secured by brazing to the metallized layers. The diameter of the metal wire is set to 0.5 to 3 mm, and the metal wires are buried in the openings, at a depth of 1 to 5 mm.
    Type: Grant
    Filed: July 10, 1987
    Date of Patent: February 7, 1989
    Assignee: Nippondenso Co., Ltd.
    Inventors: Hiroki Hoshizaki, Kazuo Oyobe, Hirofumi Suzuki, Nobuaki Kawahara, Hitoshi Niwa, Terutaka Kageyama
  • Patent number: 4764435
    Abstract: A metal composition usable as a brazing material for bonding a metal to a non-oxide ceramic. The brazing material contains, at least, one or more metals selected from a first group of transition metals consisting of Pt, Pd, Rh, Ir, Ru and Os, and one or more metals selected from a second group of transition metals consisting of Cr, Mn, Fe, Co, Ni and Cu. The material may further contain one or more elements selected from a third group of elements consisting of B, C, Si and P.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: August 16, 1988
    Assignee: Nippondenso Co., Ltd.
    Inventors: Hiroki Hosizaki, Hirofumi Suzuki, Terutaka Kageyama
  • Patent number: 4723973
    Abstract: An exhaust-gas purifying apparatus according to the present invention comprises an exhaust-gas filter for trapping particulates in exhaust gas from an engine, and a heating device located on the upper-course side of the filter, with respect to the flowing direction of the exhaust gas, the heating device including one or more conductive-ceramic heater elements, capable of heating and burning the particulates caught by the filter, and a heater case for holding the heater elements in position, so that the caught particulates are heated and burned by the heater elements when the flow resistance of the exhaust gas, flowing through the filter, is increased by the caught particulates, whereby the flow resistance is reduced. The heater element includes a fixed electrode portion, immovably fixed to the heater case, and a slidable electrode portion held slidably.
    Type: Grant
    Filed: September 26, 1986
    Date of Patent: February 9, 1988
    Assignees: Nippondenso Co., Ltd., Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuo Oyobe, Hiroki Hoshizaki, Terutaka Kageyama, Hirofumi Suzuki, Yoshihiko Imamura, Kiyoshi Kobashi, Kenichiro Takama, Shinichi Takeshima
  • Patent number: 4723069
    Abstract: A ceramic heater for regenerating a fine particle collecting filter which is exposed to exhaust gases at elevated temperatures. This ceramic heater comprises two electrode potions, a heat generation portion connected to the two electrode portions and a holding projection portion of a ceramic heater connected to the side of the heat generating portion. The two electrode portions, the heat generating portion and the holding projection portion are formed integrally.
    Type: Grant
    Filed: September 16, 1986
    Date of Patent: February 2, 1988
    Assignees: Toyota Jidosha Kabushiki Kaisha, Nippondenso Co., Ltd.
    Inventors: Hiroki Hoshizaki, Kazuo Oyobe, Hirofumi Suzuki, Nobuaki Kawahara, Terutaka Kageyama, Hitoshi Niwa, Shinichi Takeshima, Yoshihiko Imamura, Kiyoshi Kobashi, Kenichiro Takama
  • Patent number: 4711990
    Abstract: The ceramic heater of the present invention is used for regenerating a fine particle collecting filter which is exposed to exhaust gases at elevated temperatures. In this ceramic heater, which is capable of being cantilevered, two electrode portions are provided on a single straight or curved line and heat generating portion is positioned on one side of said line. The heat generating portion comprises a ring-like portion and two leg portions integrally connected to the ring-like portion at two connecting portions which approximately bisect the ring-like portion. The two electrode portions are provided at fore ends of the leg portions respectively, and the ring-like portion and the two electrode portions conjointly form a triangle.
    Type: Grant
    Filed: January 7, 1986
    Date of Patent: December 8, 1987
    Assignee: Nippondenso Co., Ltd.
    Inventors: Hiroki Hoshizaki, Nobuaki Kawahara, Hirofumi Suzuki, Kazuo Oyobe
  • Patent number: 4652727
    Abstract: The ceramic heater of the present invention is used as a regenerating heater for a carbon particulate collecting filter. The ceramic heater comprises a heat-generating body composed of a sintered body which comprises an electroconductive ceramic, such as titanium nitride, and an insulating material, such as silicon nitride. An electroconductive layer is formed on a selected portion of the surface of the heat-generating body. The ratio of the electroconductive ceramic ingredient of the electroconductive layer is greater than the ratio of the electroconductive ceramic ingredient of the heat-generating body. The electroconductive layer of the ceramic heater is formed by partially heat-decomposing silicon nitride.
    Type: Grant
    Filed: October 25, 1985
    Date of Patent: March 24, 1987
    Assignee: Nippondenso Co., Ltd.
    Inventors: Hiroki Hoshizaki, Hirofumi Suzuki, Terutaka Kageyama, Kazuo Oyobe
  • Patent number: 4613455
    Abstract: A ceramic heater of the present invention comprises a sintered heating element bonded to a supporting substrate or a sintered element alone. A sintered body comprises the heating element is mainly composed of silicon nitride with such sintering agents as yttrium oxide to be superior in strength, thermal shock resistance and thermal resistance. The sintered body also includes 10-80 mol % of titanium carbide, titanium nitride or a mixture thereof which are electrically conductive ceramics so that the specific electrical resistance can be controlled.A method for producing a ceramic heater of the present invention consists of the first process in which a powdery mixture is prepared by mixing powders which are made to have structures of a solid solution by previous calcination of silicon nitride and a sintering agent and powders of conductive ceramics which comprise either or both of titanium carbide and titanium nitride, and the second process in which such powdery mixture is formed and sintered by heating.
    Type: Grant
    Filed: December 19, 1985
    Date of Patent: September 23, 1986
    Assignee: Nippondenso Co., Ltd.
    Inventors: Hirofumi Suzuki, Hitoshi Yoshida, Shunzo Yamaguchi
  • Patent number: 4544288
    Abstract: An improved impact dot printing head in which a printing needle is secured more firmly to an armature than ever, particularly they are secured or soldered to each other at their mating portions by way of a solder material selected from nickel and nickel alloys, and a method of producing the printing head in which either an armature or a printing needle is plated, at least a mating portion thereof with the other, with such a solder material, and then they are assembled to each other and then the assembly is heated in a furnace so as to effect soldering of the printing needle to the armature with the solder material.
    Type: Grant
    Filed: November 23, 1983
    Date of Patent: October 1, 1985
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Hirofumi Suzuki, Masahiko Waki, Kunimitsu Harada
  • Patent number: 4095260
    Abstract: In a color picture tube device of the electromagnetic deflection in-line electron gun type including a color picture tube with a neck portion and funnel portion and a deflection yoke device mounted near the joint between the neck portion and the funnel portion and provided with a deflection yoke assembly having an inner diameter sufficiently larger than the joint neck and funnel portion such that the deflection yoke can move in a direction perpendicular to the tube axis, the deflection yoke device comprises supporting means for supporting the deflection yoke assembly having a first portion movable along the neck portion and a second portion disposed substantially perpendicular to the first portion but tiltable with respect to the tube axis, means for securing the deflection yoke assembly to the second portion of the supporting means, and at least two wedge means inserted and fixed in a gap between the funnel portion and the deflection yoke assembly.
    Type: Grant
    Filed: April 15, 1977
    Date of Patent: June 13, 1978
    Assignee: Hitachi, Ltd.
    Inventor: Hirofumi Suzuki