Patents by Inventor Shigeru Nakagawa

Shigeru Nakagawa 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: 4818148
    Abstract: A covering is applied onto the outer surface of a pile including a steel pipe or the like to surround a predetermined length thereof so as to reduce a frost heaving force or negative friction acting on the pile in a frigid area. The covering is closely adhered by an adhesion layer the like to the pile over a given length thereof. This given length is between 0.5 and 5 m. The covering member includes a smooth-surfaced plastic covering or elastic covering. A rugged surface covering may be provided below the smooth surfaced covering.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: April 4, 1989
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Takashi Takeda, Katsumi Omori, Toshiyuki Ohkuma, Kenji Kidera, Shigeru Nakagawa, Tetsuzo Hirose
  • Patent number: 4663869
    Abstract: The three dimensional display of the invention includes a display plate and a light source provided behind the plate. The display plate fundamentally includes a substrate made of a transparent material, an undercoating of transparent organic based color or colorless paint provided on the front surface of the plate, a light-reflective transparent metal coating on the undercoating, a transparent protective coating on the metal coating and a light-reflective surface provided on the rear surface of the substrate, the light reflective surface being opaque as a whole and including light-penetrable or transparent portions or vacant portions in the form of a predetermined image. To make the front surface of the display plate look like a roughened metal wall surface, the front surface of the substrate is roughened or the undercoating contains an agent which makes the front surface of the undercoating rough.
    Type: Grant
    Filed: June 21, 1985
    Date of Patent: May 12, 1987
    Assignee: Marui Industry Co., Ltd.
    Inventor: Shigeru Nakagawa
  • Patent number: 4643912
    Abstract: A method for forming a metal layer with a positive pattern on a plastic sheet or plate substrate which comprises printing an oil-soluble, water-insoluble ink on the substrate to provide a negative pattern, forming a metal layer on said substrate by dry metal plating, immersing the substrate in a hydrocarbon having 6-17 carbon atoms, preferably kerosene, and removing the ink layer and metal layer thereon by applying supersonic vibration to the substrate in the kerosene.
    Type: Grant
    Filed: September 27, 1984
    Date of Patent: February 17, 1987
    Assignee: Marui Industry Co., Ltd.
    Inventors: Shigeru Nakagawa, Kiyotaka Uchikawa
  • Patent number: 4585681
    Abstract: A frost damage proofed pile for installment in a frigid district where the pile is subjected to a freezing and frost heaving force, such as permanently or seasonally frozen soil terrain. A tubular sheath member is fitted over the pile surface and has a length longer than the thickness of an active or seasonally frozen soil layer of the terrain in which the pile is installed. At least a portion of said length of the pile is formed as an extensible section, and at least the lower end of said sheath member is secured to the pile at or below a position corresponding to the bottom region of said active or seasonally frozen soil layer. A fluid material is filled in a space defined between the pile and the sheath member. The frost heaving force caused to exist upon freezing of the active or seasonally frozen soil layer as well as negative friction caused to exist in summer are inhibited from affecting the pile due to sliding of the sheath member relative to the pile.
    Type: Grant
    Filed: June 26, 1984
    Date of Patent: April 29, 1986
    Inventors: Kenji Kidera, Shigeru Nakagawa, Takashi Takeda, Katsumi Omori, Toshiyuki Okuma
  • Patent number: 4417411
    Abstract: This invention discloses an information display device including a front plate and information visualizing means provided behind the front plate and adapted to make information consisting of characters, patters and/or others appear on the front surface of the plate by the light emitted from the visualizing means and passing through the plate, the device being characterized in that the front plate is made from transparent material such as transparent synthetic resins, glass or the like and is provided with metal coating on the front surface or the back surface of the front plate. The thickness of the metal coating is such that the metal coating permits the light emitted from the visualizing means to pass through it to make the information emerge on the front surface of the front plate and substantially prevents light the intensity of which is less than the former light from passing through the coating.
    Type: Grant
    Filed: November 24, 1981
    Date of Patent: November 29, 1983
    Assignee: Marui Industry Co., Ltd.
    Inventors: Naoki Miyagishima, Shigeru Nakagawa