Patents by Inventor Fuminori Ito

Fuminori Ito 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: 6114694
    Abstract: The present invention discloses a field emission type cold cathode incorporated device, which comprises a field emission type cold cathode having a number of electron emitting sections, said sections having sharp projections, and a vacuum tank for placing the field emission type cold cathode in a vacuum environment. In this device, a partial pressure of particular noble gas in residual gas contained in the vacuum tank is set equal to or lower than C/I (C is a constant and I is a maximum emission current value per one of the number of electron emitting sections during driving of the field emission type cold cathode). Also, in order to set a partial pressure of the particular noble gas in the residual gas contained in the vacuum tank equal to C/I (C: constant) or lower, a partial pressure of the particular residual gas in the vacuum tank is monitored by a mass analyzer during vacuum tank exhaustion.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: September 5, 2000
    Assignee: NEC Corporation
    Inventor: Fuminori Ito
  • Patent number: 6040973
    Abstract: A field emission cold cathode device is driven to make an emission current constant without limiting the available choice of materials for a gate electrode. A positive voltage with reference to OV is applied from a gate power supply to gate electrode of the field emission cold cathode device to enable emitter disposed respectively near the gate electrode to emit electrons. After the positive voltage with reference to OV is applied, a negative voltage with reference to OV is applied from the gate power supply to the gate electrode at a predetermined time.
    Type: Grant
    Filed: January 28, 1998
    Date of Patent: March 21, 2000
    Assignee: NEC Corporaiton
    Inventors: Akihiko Okamoto, Fuminori Ito
  • Patent number: 5938495
    Abstract: In a method of manufacturing a field emission cold cathode which has an emitter chip (25) of a metal material on a conductive layer (21) and is placed in a predetermined vacuum, a protection film (26) is formed on the emitter chip to prevent an unfavourable layer from being formed directly on the emitter chip. The protection film is removed from the emitter chip at a time when the field mission cold cathode is placed in the predetermined vacuum. On the conductive layer, an insulation layer (22) and a gate electrode layer (23) are formed to define a cavity (24). In the cavity, the emitter chip is formed on an exposed surface (21a) of the conductive layer.
    Type: Grant
    Filed: May 8, 1997
    Date of Patent: August 17, 1999
    Assignee: NEC Corporation
    Inventor: Fuminori Ito
  • Patent number: 5825134
    Abstract: A field emission cathode has an emitter tip, on a conductive layer, disposed within holes that are formed through an insulating layer deposited on the conductive layer and a gate layer deposited on the insulating layer, respectively. A method according to the present invention comprises the step of applying to the gate layer an activation voltage to activate the emitter tip before operating the field emission cathode with operating gate voltages. The activation voltage is greater than any one of the operating gate voltages but less than a dielectric breakdown voltage.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: October 20, 1998
    Assignee: NEC Corporation
    Inventor: Fuminori Ito
  • Patent number: 5291172
    Abstract: A noise absorber provided with a fixture disposed at a flank of a body, thereby improving the positionability of the noise absorber and easy access thereto for handling. The body and the fixture are integrally connected by engaging a first engaging portion provided on the body with a second engaging portion on the fixture. When the body and the fixture are connected, the bottom of the body and the bottom surface of the fixture are at the same height, thereby coordinately supporting the noise absorber on a chassis or a printed board. Since the fixture is provided at the flank of the body on the same level, the height of the noise absorber as a whole is reduced. The noise absorber is thus advantageous for positioning in a location with limited space. Moreover, since the fixture to be handled is positioned at the flank of the body for easy access, the noise absorber of this invention can be easily fitted or disassembled.
    Type: Grant
    Filed: April 21, 1992
    Date of Patent: March 1, 1994
    Assignee: Kitagawa Industries Co., Ltd.
    Inventors: Fuminori Ito, Hiroyuki Ikeda
  • Patent number: 5187648
    Abstract: A guide rail for a printed circuit board mounted in a partially conductive housing comprises a conductive guide member and an insulative fixing member. The guide member is inserted into a receiving portion of the fixing member from an inlet formed in the bottom thereof. In this condition, contact members of the guide member project outwardly from the inlet. Then, the fixtures of the fixing member are secured to the housing. Since the operator only touches the insulative fixing member to perform the above mounting, corrosion of the guide member is prevented. The contact members projecting outwardly from the inlet is deflected toward the receiving portion of the fixing member when the fixing member is secured to the housing, thereby intimately contacting to a conductive portion of the housing. Thus, a stable connection between the guide member and the housing is attained.
    Type: Grant
    Filed: March 4, 1992
    Date of Patent: February 16, 1993
    Assignee: Kitagawa Industries Co., Ltd.
    Inventor: Fuminori Ito
  • Patent number: 4923153
    Abstract: A clamp for holding a strip, e.g. a flat cable, securely on a mounting surface includes an overlapping top plate, stepped ridges, and resilient flaps tightly holding the strip in place within the clamp. This design makes the clamp less likely to inadvertently work itself loose from a mounting surface to which it is adhesively secured.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: May 8, 1990
    Assignee: Kitagawa Industries Co., Ltd.
    Inventors: Kazuhiro Matsui, Fuminori Ito
  • Patent number: D326407
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: May 26, 1992
    Assignee: Kitagawa Industries Co., Ltd.
    Inventor: Fuminori Ito