Patents by Inventor Shigenobu Yamamoto

Shigenobu Yamamoto 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).

  • Automatic personal search telephone system
    Patent number: 5414759
    Abstract: A telephone system which, when a call terminating subscriber which should receive a call from a call originating subscriber is not at the location of his telephone, a location registration unit is accessed so as to call the telephone nearest to the call terminating subscriber, wherein, even when the registration in the location registration unit is not correct, the location information source is referred to deduce the correct location of the call terminating subscriber. This location information source contains various types of sensor information and schedule management information showing the whereabouts of the call terminating subscriber.
    Type: Grant
    Filed: September 20, 1993
    Date of Patent: May 9, 1995
    Assignee: Fujitsu Limited
    Inventors: Hiroaki Ishikuri, Shigenobu Yamamoto