Patents by Inventor Hideaki Kozawa

Hideaki Kozawa 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).

  • Method of manufacturing a nickel-metal hydride secondary cell
    Patent number: 5537733
    Abstract: A rectangular nickel-metal hydride secondary cell permits improving the air-tightness and also permits preventing a metal case from being deformed in a step of folding an open end portion of the metal case. The rectangular nickel-metal hydride secondary cell, includes a rectangular cylindrical metal case having a bottom, an electrode group housed in the metal case, an alkali electrolyte contained in the metal case, a rectangular sealing plate mounted near the open end portion of the metal case. An insulating gasket is interposed in a compressed state between the inner wall near the open end of the metal case and the sealing plate. The metal case comprises a folded portion formed by inwardly folding the open end portion of the metal case and an inwardly projecting stepped portion formed along the inner surface of the metal case below the folded portion.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: July 23, 1996
    Assignee: Toshiba Battery Co., Ltd.
    Inventors: Hideaki Kozawa, Kazuo Kojima, Tomoyuki Ono, Hirofumi Yanagawa, Hideaki Kitazume, Kouji Taguchi
  • Method of making a rectangular nickel-metal hydride secondary cell
    Patent number: 5490867
    Abstract: A rectangular nickel-metal hydride secondary cell permits improving the air-tightness and-also permits preventing a metal case from being deformed in the step of folding an open end portion of the metal case.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: February 13, 1996
    Assignee: Toshiba Battery Co., Ltd.
    Inventors: Hideaki Kozawa, Kazuo Kojima, Tomoyuki Ono, Hirofumi Yanagawa, Hideaki Kitazume, Kouji Taguchi
  • Rectangular nickel-metal hydride secondary cell
    Patent number: 5372897
    Abstract: A rectangular nickel-metal hydride secondary cell permits improving the air-tightness and also permits preventing a metal case from being deformed in the step of folding an open end portion of the metal case.
    Type: Grant
    Filed: July 23, 1993
    Date of Patent: December 13, 1994
    Assignee: Toshiba Battery Co., Ltd.
    Inventors: Hideaki Kozawa, Kazuo Kojima, Tomoyuki Ono, Hirofumi Yanagawa, Hideaki Kitazume, Kouji Taguchi