Patents by Inventor Minako Iwasaki

Minako Iwasaki 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: 6325611
    Abstract: A non-aqueous secondary cell comprising a wound structure, in which a positive electrode having a positive collector carrying positive active material on both sides at least at a part of the collector and a negative electrode having a negative collector carrying a negative active material on both sides at least at a part of the collector are wound with inserting a separator inbetween, and a cell can for holding said electrodes, in which the electrode, which faces the can, consists of either electrode material, the outer side of the positive collector at least in the outermost part of the positive electrode has no coating film containing a positive active material, said outer most part of the positive collector faces the negative electrode or the inner wall of the cell can through the separator, and a lead member which is welded to the negative collector does not directly face the positive electrode through the separator.
    Type: Grant
    Filed: July 9, 1999
    Date of Patent: December 4, 2001
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Minako Iwasaki, Hayato Higuchi, Hiroki Ishikawa, Koji Murakami, Fusaji Kita, Kazunobu Matsumoto