Patents by Inventor Yoshikazu Koganei

Yoshikazu Koganei 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).

  • Portable information device
    Patent number: 6306538
    Abstract: A card body 2 has two battery holding sections (13, 14) inside, and two battery holders (9, 10) each containing a battery are housed therein. The two housed battery holders (9, 10) engage locking portions (22a, 22b) of a stopper (11), thereby setting them unremovable. When the stopper (11) is slid toward one battery holding section (14), the battery holder (10) therein is still kept unremovable, while the other battery holder (9) can be made removable. Thus, even during battery change, at least one battery always remains in the card body to keep supplying a backup voltage to a volatile memory.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: October 23, 2001
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Asao Saitoh, Yuichi Kato, Shizuo Yamaguchi, Yoshikazu Koganei
  • IC card
    Patent number: D405441
    Type: Grant
    Filed: September 4, 1997
    Date of Patent: February 9, 1999
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Asao Saito, Yoshikazu Koganei, Yuichi Kato
  • LC card
    Patent number: D410913
    Type: Grant
    Filed: January 7, 1998
    Date of Patent: June 15, 1999
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Asao Saito, Yuichi Kato, Yoshikazu Koganei