Patents by Inventor Chigusa Hamada

Chigusa Hamada 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).

  • Spatial information search system
    Patent number: 6708183
    Abstract: It is an object of the present invention to provide a scheme for distributing spatial information between information providers and information users. To achieve this object, the present invention creates a corresponding index for each spatial information. The index includes information related to a position included in spatial information, and data related to a storage location of the spatial information. This index also includes (1) a source ID for uniquely identifying spatial information; (2) coordinate translation values which are parameters used to correspond certain spatial information to other spatial information; and (3) when the spatial information including this index was created by referencing other spatial information, an underlay diagram specifying ID represented by the source ID possessed by the referenced spatial information, or the like.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: March 16, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Maki Mori, Koichi Homma, Shuji Kitazawa, Hiroshi Yajima, Yoshiaki Yoshikawa, Mitsuhiko Yoshimura, Chigusa Hamada