Patents by Inventor Kazuko Wakita

Kazuko Wakita 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: 6392731
    Abstract: A liquid crystal display device with an In-panel switching system mode includes a conductive body for adjusting an electric field, disposed between elongated electrodes such that the conductive member is electrically isolated from the elongated electrodes.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: May 21, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Tetsuya Satake, Takahiro Nishioka, Kazuko Wakita, Tadashi Saito, Hiroyuki Fuchigami, Tetsuyuki Kurata
  • Patent number: 5888684
    Abstract: An electrophotographic photosensitive member which comprises an aluminum substrate having an aluminum oxide film at its surface, and, formed sequentially on the substrate, an intermediate layer and a photosensitive layer which contains a photoconductive material, wherein the intermediate layer contains from 5 to 20 wt % of a photoconductive material and has a thickness of from 0.5 to 5 .mu.m, and the resistivity of a laminate of the aluminum oxide film and the intermediate layer is from 10.sup.9 to 3.times.10.sup.10 .OMEGA./3.14 cm.sup.2 when a DC voltage of 20 V is applied.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: March 30, 1999
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshio Kobayashi, Kazuki Kubo, Kazuko Wakita, Suguru Nagae, Takamitsu Fujimoto
  • Patent number: 5834147
    Abstract: A photosensitive member for electrophotography having excellent electrophotographic characteristics such as chargeability, photosensitivity and dark attenuation, excellent corona resistance and excellent durability, which comprises an electrically conductive support and a photosensitive layer containing a resin binder and particles of a photoconductive phthalocyanine compound dispersed in said binder, said photosensitive layer containing at least one member selected from the group consisting of an electron acceptive material, a coupling agent, an antioxidant and a hydroxyl group-containing polymer.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: November 10, 1998
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Suguru Nagae, Kazuko Wakita, Toshio Kobayashi, Yoshimi Sugimoto, Sei Tsunoda, Kikuo Hayama, Koe Enmanji
  • Patent number: 5686216
    Abstract: An object of the present invention is to provide a photosensitive member having an excellent durability. A sensitizing solution is prepared by adding a polyester resin (resin A) synthesized using an isophthalic acid, neopentyl glycol, phthalic anhydride and adipic acid, other polyester resins, an X-form metal free phthalocyanine as a phthalocyanine type photoconductive compound and a curing agent to a solvent, and is dip-coated on a polyamide layer on an aluminum plate and then dried and cured to give a photosensitive member.
    Type: Grant
    Filed: November 14, 1995
    Date of Patent: November 11, 1997
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazuki Kubo, Takamitsu Fujimoto, Suguru Nagae, Toshio Kobayashi, Kazuko Wakita