Patents by Inventor Shinji Matsuda

Shinji Matsuda 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: 5750997
    Abstract: A method for observing wiring patterns of a printed circuit board includes the steps of projecting light having a wave length within an infrared range on the printed circuit board, detecting reflected light from the printed circuit board, and forming an image based on the reflected light, so that the wiring patterns of the printed circuit board is observed through the image.
    Type: Grant
    Filed: February 6, 1996
    Date of Patent: May 12, 1998
    Assignee: Fujitsu Limited
    Inventor: Shinji Matsuda
  • Patent number: 5550325
    Abstract: A printed-circuit board includes an insulating substrate, at least one insulating layer formed on the substrate, a circuit pattern formed on the layer, and a protective coating layer formed on the insulating layer having the circuit pattern formed thereon. The circuit pattern has a location to be cut, if necessary. A material of the protective coating layer is at least partially eliminated from two zones which are disposed at sides of the location to be cut, and a material of the insulating layer may be further at least partially eliminated from those zones.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: August 27, 1996
    Assignee: Fujitsu Limited
    Inventor: Shinji Matsuda
  • Patent number: 5145269
    Abstract: A printer with a plurality of ink ribbon cassettes is capable of printing characters or designs with a selected one of these ink ribbon cassettes. The printer includes a vertically movable cassette table on which the plurality of ink ribbon cassettes are mounted in a stacked relationship, a stepping motor, and a rotary cam mechanism for moving the cassette table up and down when the stepping motor drives to rotate the rotary cam mechanism. There is further provided a memory for pre-storing the rotational speed data for each rotational angle of the rotary cam mechanism according to a variation pattern of load applied to the stepping motor together with the rotation of the rotary cam mechanism. The rotational speed of the stepping motor is controlled accoding to the rotational speed data corresponding toe ach rotational angle of the rotary cam mechanism read out of the memory.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: September 8, 1992
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shinji Matsuda, Kenji Sugimura, Youichi Nakanishi
  • Patent number: 5031663
    Abstract: A pressure control valve delivers a pressure which is proportional to a current level chosen to energize a solenoid therein to a shock absorber of a suspension. A spool in the valve has an annular groove for communicating an output port to a high pressure port or a low pressure port selectively. There are conical surfaces or inclined surfaces at edges of lands adjacent to the groove, which incline from annular surfaces of the lands toward the bottom of the groove. The inclined surfaces slow down a change of the flow rate from the high pressure port to the output port and from the output port to the low pressure port when the annular groove communicates with the high pressure port and the low pressure port respectively.
    Type: Grant
    Filed: April 3, 1990
    Date of Patent: July 16, 1991
    Assignees: Aisin Seiki Kabushiki Kaisha, Toyota Jidosha Kabushiki Kaisha
    Inventors: Masahiro Fukuta, Osamu Komazawa, Tsukasa Watanabe, Hiroyuki Ikemoto, Toshio Onuma, Shinji Matsuda, Kunihito Sato