Patents by Inventor Takahiro Koyama

Takahiro Koyama 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).

  • Publication number: 20050052546
    Abstract: In an image pickup apparatus, a particular color signal is extracted from an input video signal based on the selected image taking mode information, white balance control amount calculating means calculates a control amount based on the extracted video signal of the particular color, the white balance correcting means corrects the white balance of the video signal according to this control amount, and then the color correcting means corrects the particular color signal in the video signal based on color correction parameter values set in advance. Subsequently, low chroma color suppression processing means corrects the gain amount of the video signal corresponding to the predetermined area centered at the origin in the color difference plane, from among the video signal corrected by the color correcting means, thereby correcting the particular color in the video signal and also correcting white balance deviated due to the correction of the particular color.
    Type: Application
    Filed: September 9, 2004
    Publication date: March 10, 2005
    Inventors: Kiyotaka Nakabayashi, Takahiro Koyama
  • Publication number: 20040131495
    Abstract: An aluminum alloy piping material for automotive tubes having excellent tube expansion formability by bulge forming at the tube end and superior corrosion resistance, which is suitably used for a tube connecting an automotive radiator and heater, or for a tube connecting an evaporator, condenser, and compressor. The aluminum alloy piping material is an annealed material of an aluminum alloy comprising 0.3 to 1.5% of Mn, 0.20% or less of Cu, 0.10 to 0.20% of Ti, more than 0.20% but 0.60% or less of Fe, and 0.50% or less of Si with the balance being aluminum and unavoidable impurities, wherein the aluminum alloy piping material has an average crystal grain size of 100 &mgr;m or less, and Ti-based compounds having a grain size (circle equivalent diameter, hereinafter the same) of 10 &mgr;m or more do not exist as an aggregate of two or more serial compounds in a single crystal grain.
    Type: Application
    Filed: September 29, 2003
    Publication date: July 8, 2004
    Inventors: Yoshiharu Hasegawa, Haruhiko Miyachi, Takahiro Koyama, Yoshifusa Shoji
  • Patent number: 6638376
    Abstract: An aluminum alloy piping material exhibiting good corrosion resistance and having an excellent workability, such as bulge formation capability at the pipe ends. The aluminum alloy piping material is suitably used for pipes connecting automotive radiators and heaters or pipes connecting evaporators, condensers, and compressors. The aluminum alloy material is formed from an aluminum alloy which contains 0.3-1.5% of Mn, 0.20% or less of Cu, 0.06-0.30% of Ti, 0.01-0.20% of Fe, and 0.01-0.20% of Si, with the balance being Al and impurities, wherein, among Si compounds, Fe compounds, and Mn compounds present in the matrix, the number of compounds with a particle diameter of 0.5 &mgr;m or more is 2×104 or less per mm2. The aluminum alloy piping material may further comprise 0.4% or less of Mg.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: October 28, 2003
    Assignees: Denso Corporation, Sumitomo Light Metal Industries, Ltd.
    Inventors: Yoshiharu Hasegawa, Haruhiko Miyachi, Hirokazu Tanaka, Yoshifusa Shoji, Takahiro Koyama, Toshihiko Fukuda
  • Patent number: 6638377
    Abstract: An aluminum alloy piping material for automotive piping excelling in corrosion resistance and workability and a method of fabricating the same. The aluminum alloy piping material is made of an aluminum alloy which contains 0.3-1.5% of Mn, 0.01-0.20% of Fe, and 0.01-0.20% of Si, wherein the content of Cu as impurities is limited to 0.05% or less, with the balance being Al and impurities, wherein, among Si compounds, Fe compounds, and Mn compounds present in the alloy's matrix, the number of compounds with a particle diameter (equivalent circle diameter, hereinafter the same) of 0.5 &mgr;m or more is 3×104 or less per mm2. The aluminum alloy piping material has a tensile strength of 70-130 MPa (temper: O material). An ingot of an aluminum alloy having the composition is hot extruded. The resulting extruded pipe is cold drawn at a working ratio of 30% or more and annealed.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: October 28, 2003
    Assignee: Sumitomo Light Metal Industries, Ltd.
    Inventors: Takahiro Koyama, Hirokazu Tanaka, Yoshifusa Shoji
  • Publication number: 20030000610
    Abstract: An aluminum alloy piping material for automotive piping excelling in corrosion resistance and workability and a method of fabricating the same. The aluminum alloy piping material comprises an aluminum alloy which comprises 0.3-1.5% of Mn, 0.01-0.20% of Fe, and 0.01-0.20% of Si, wherein the content of Cu as impurities is limited to 0.05% or less, with the balance consisting of Al and impurities, wherein, among Si compounds, Fe compounds, and Mn compounds present in the alloy matrix, the number of compounds with a particle diameter (equivalent circle diameter, hereinafter the same) of 0.5 &mgr;m or more is 3×104 or less per mm2. The aluminum alloy piping material has a tensile strength of 70-130 MPa (temper: O material). An ingot of an aluminum alloy having the composition is hot extruded. The resulting extruded pipe is cold drawn at a working ratio of 30% or more and annealed.
    Type: Application
    Filed: September 17, 2001
    Publication date: January 2, 2003
    Inventors: Takahiro Koyama, Hirokazu Tanaka, Yoshifusa Shoji
  • Publication number: 20020071782
    Abstract: An aluminum alloy piping material exhibiting good corrosion resistance and excelling in workability such as bulge formation capability at the pipe ends. The aluminum alloy piping material is suitably used for pipes connecting automotive radiators and heaters or pipes connecting evaporators, condensers, and compressors. The aluminum alloy material comprises an aluminum alloy which comprises 0.3-1.5% of Mn, 0.20% or less of Cu, 0.06-0.30% of Ti, 0.01-0.20% of Fe, and 0.01-0.20% of Si, with the balance consisting of Al and impurities, wherein, among Si compounds, Fe compounds, and Mn compounds present in the matrix, the number of compounds with a particle diameter of 0.5 &mgr;m or more is 2×104 or less per mm2. The aluminum alloy piping material may further comprise 0.4% or less of Mg.
    Type: Application
    Filed: September 14, 2001
    Publication date: June 13, 2002
    Inventors: Yoshiharu Hasegawa, Haruhiko Miyachi, Hirokazu Tanaka, Yoshifusa Shoji, Takahiro Koyama, Toshihiko Fukuda
  • Patent number: 6129143
    Abstract: A brazing sheet which has an excellent corrosion resistance and cladding rolling property, and is formed from a four layer aluminum alloy cladding member, and a heat exchanger of aluminum alloy, in which the brazing sheet is used, are provided. The brazing sheet is suitable for use as a member in the fluid path of an aluminum heat exchange for a car, and particularly, as a core plate of a drawn cup type heat exchanger. In the brazing sheet, one side of a core member is cladded with an intermediate member less noble than a core member, and the other side of both the core member and the intermediate member are cladded with Al--Si--Mg type cladding member, wherein the core member is of an aluminum alloy containing 0.5 to 1.6% of Mn, 0.15 to 0.35% of Cu, 0.05 to 0.50% of Mg, 0.06 to 0.30% of Ti, and the remainder being Al and unavoidable impurities, and the intermediate member contains 0.5 to 1.2% of Mn and the remainder being aluminum and unavoidable impurities, and 0.05 to 1.
    Type: Grant
    Filed: August 5, 1997
    Date of Patent: October 10, 2000
    Assignees: Denso Corporation, Sumitomo Light Metal Industries, Ltd.
    Inventors: Yoshiharu Hasegawa, Haruhiko Miyachi, Yuji Suzuki, Hiroshi Ikeda, Hirokazu Tanaka, Takahiro Koyama, Koji Hirao
  • Patent number: 5268078
    Abstract: This invention relates to Al plates suitable for automobile body panels and also relates to a method of pretreatment for painting. The features are: A Zn plating layer having 0.05.about.0.38 g/m.sup.2 of coating weight is formed on the surface of an Al plate or Al alloy plate by a displacement plating process or electroplating process. The coated Al or Al alloy plate is subjected to chemical conversion treatment with zinc phosphate under conditions to completely dissolve the zinc plating layer. This invention prevents the occurrence of filiform rusting and blistering after painting.
    Type: Grant
    Filed: October 6, 1992
    Date of Patent: December 7, 1993
    Assignee: Sumitomo Light Metal Industries, Ltd.
    Inventors: Takahiro Koyama, Yoshihumi Hasegawa, Tatsumi Takahashi
  • Patent number: 5176963
    Abstract: This invention relates to Al plates suitable for automobile body panels and also relates to a method of pretreatment for painting. The features are: A Zn plating layer having 0.05.about.0.38 g/m.sup.2 of coating weight is formed on the surface of an Al plate or Al alloy plate by a displacement plating process or electroplating process. The coated Al or Al alloy plate is subjected to chemical conversion treatment with zinc phosphate under conditions to completely dissolve the zinc plating layer. This invention prevents the occurrence of filiform rusting and blistering after painting.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: January 5, 1993
    Assignee: Sumitomo Light Metal Industries, Ltd.
    Inventors: Takahiro Koyama, Yoshihumi Hasegawa, Tatsumi Takahashi
  • Patent number: 4784848
    Abstract: A waving lotion composition is thickened and is more spreadable when there is used, as a thickening and spreading agent, an alkali metal salt or ammonium salt of carboxymethylcellulose (CMC) having an etherificiation degree of 2.4 or more.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: November 15, 1988
    Assignee: Daicel Chemical Industries, Ltd.
    Inventor: Takahiro Koyama
  • Patent number: 4584370
    Abstract: The present invention is directed to a method of producing calcium cellulose glycolate. Basically, the method comprises converting sodium cellulose glycolate to calcium cellulose glycolate in a heterogeneous reaction system under particular reaction conditions.
    Type: Grant
    Filed: August 13, 1984
    Date of Patent: April 22, 1986
    Inventors: Jun Taguchi, Hiroomi Kobayashi, Takahiro Koyama
  • Patent number: 4508893
    Abstract: A process for the preparation of a powdery calcium cellulose glycolate which comprises reacting cellulose glycolic acid in wet form with a calcium reagent, drying and pulverizing the resultant, wherein the calcium reagent is calcium hydroxide or a combination of calcium hydroxide and calcium carbonate.
    Type: Grant
    Filed: August 23, 1984
    Date of Patent: April 2, 1985
    Assignees: Daicel Chemical Industries Ltd., Nichirin Chemical Industries Ltd.
    Inventors: Takahiro Koyama, Haruo Matsumura, Teturo Morita
  • Patent number: 4267198
    Abstract: A melt-coated preparation comprising sorbic acid particles and a coating agent composed mainly of a solid fat, at least 80% by weight of the sorbic acid having a particle diameter greater than 80 microns to about 150 microns, and the amount of the sorbic acid being about 0.9 to 2 times the weight of the coating agent.
    Type: Grant
    Filed: June 27, 1979
    Date of Patent: May 12, 1981
    Assignee: Daicel Ltd.
    Inventors: Kazuo Sato, Akira Asahi, Takahiro Koyama