Patents by Inventor Mitsuo Ishizuka

Mitsuo Ishizuka 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: 6129985
    Abstract: The front surface of a wooden overlay sheet having a wood material on the front surface is subjected to a color treatment with a colorant. A resin-based primer is then applied to the colored front surface and a transparent resin layer is then formed on the resin-based primer.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: October 10, 2000
    Assignee: Yamaha Corporation
    Inventors: Hisayoshi Ohsumi, Takeshi Matsumoto, Shinji Kato, Mitsuo Ishizuka, Shoichi Kaneko
  • Patent number: 5863479
    Abstract: The front surface of a wooden overlay sheet having a wood material on the front surface is subjected to a color treatment with a colorant. A resin-based primer is then applied to the colored front surface and a transparent resin layer is then formed on the resin-based primer.
    Type: Grant
    Filed: November 20, 1997
    Date of Patent: January 26, 1999
    Assignee: Yamaha Corporation
    Inventors: Hisayoshi Ohsumi, Takeshi Matsumoto, Shinji Kato, Mitsuo Ishizuka, Shoichi Kaneko
  • Patent number: 5811169
    Abstract: The front surface of a wooden overlay sheet, having a wooden material on the front surface thereof, is subjected to a color treatment with a colorant comprising a primer resin; the wooden overlay sheet, which was subjected to color treatment, is positioned in a metal mold for molding, and a transparent resin layer is molded on the front surface thereof by means of injection-molding. Furthermore, a synthetic resin core material is molded on the rear surface of the wooden overlay sheet. A composite molded article is thereby produced, wherein a synthetic resin core material is molded on the rear surface of the wooden overlay material, and a transparent resin layer is molded on the front surface of the wooden overlay sheet. Thus, the present invention enables the enhancement of the outer appearance of the product and the enhancement of the adhesion of the wooden overlay sheet and the transparent resin layer.
    Type: Grant
    Filed: April 2, 1996
    Date of Patent: September 22, 1998
    Assignee: Yamaha Corporation
    Inventors: Hisayoshi Ohsumi, Takeshi Matsumoto, Shinji Kato, Mitsuo Ishizuka, Shoichi Kaneko
  • Patent number: 5565263
    Abstract: A composite molded article is formed by forming a composite wood overlay surface material by laminating a wood veneer on a front side of a base sheet selected from one of a metal sheet and a resin sheet; laminating a back sheet selected from one of a porous material and a fibrous material on a back side of said base sheet; coating said wood veneer incorporated in said composite wood overlay surface material; placing said composite wood overlay surface material in a mold; and injecting a resin onto said back sheet incorporated in said composite wood overlay surface material. Thus, the composite molded article has an excellent appearance of coating on the surface of the article.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: October 15, 1996
    Assignee: Yamaha Corporation
    Inventors: Hisayoshi Ohsumi, Takeshi Matsumoto, Shinji Kato, Mitsuo Ishizuka, Shoichi Kaneko
  • Patent number: 5338592
    Abstract: The front surface of a wooden overlay sheet, having a wooden material on the front surface thereof, is subjected to a color treatment with a colorant comprising a primer resin; the wooden overlay sheet, which was subjected to color treatment, is positioned in a metal mold for molding, and a transparent resin layer is molded on the front surface thereof by means of injection-molding. Furthermore, a synthetic resin core material is molded on the rear surface of the wooden overlay sheet. A composite molded article is thereby produced, wherein a synthetic resin core material is molded on the rear surface of the wooden overlay material, and a transparent resin layer is molded on the front surface of the wooden overlay sheet. Thus, the present invention enables the enhancement of the outer appearance of the product and the enhancement of the adhesion of the wooden overlay sheet and the transparent resin layer.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: August 16, 1994
    Assignee: Yamaha
    Inventors: Hisayoshi Ohsumi, Takeshi Matsumoto, Shinji Kato, Mitsuo Ishizuka, Shoichi Kaneko
  • Patent number: 5264062
    Abstract: The present invention is related to a production method for a composite molded article. The method comprises the steps of: forming a composite wood overlay surface material by laminating a wood veneer on a front side of a base sheet selected from one of a metal sheet and a resin sheet; laminating a back sheet selected from one of a porous material and a fibrous material on a back side of said base sheet; coating said wood veneer incorporated in said composite wood overlay surface material; placing said composite wood overlay surface material in a mold; and injecting a resin onto said back sheet incorporated in said composite wood overlay surface material. Thus, the present invention provides a composite molded article having an excellent appearance of coating on the surface of the article and automation of the coating step is possible.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: November 23, 1993
    Assignee: Yamaha Corporation
    Inventors: Hisayoshi Ohsumi, Takeshi Matsumoto, Shinji Kato, Mitsuo Ishizuka, Shoichi Kaneko
  • Patent number: D643914
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: August 23, 2011
    Assignee: Hitachi Plant Technologies, Ltd.
    Inventors: Yoshiya Endo, Yuichi Inatomi, Mitsuo Ishizuka
  • Patent number: D643915
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: August 23, 2011
    Assignee: Hitachi Plant Technologies, Ltd.
    Inventors: Yoshiya Endo, Yuichi Inatomi, Mitsuo Ishizuka