Patents by Inventor Hirokazu Tuji

Hirokazu Tuji 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).

  • Mobile phone avoiding search of ineffective base stations
    Patent number: 6909892
    Abstract: When a mobile phone is out of an area covered by a communication currently in use, the fact is noticed to a user and, simultaneously therewith, a message urging the user to select another communication system is displayed. During a period in which this display is performed, it becomes possible to switch the communication system through a simple procedure.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: June 21, 2005
    Assignees: NEC Corporation, NTT DoCoMo, Inc.
    Inventors: Hirokazu Tuji, Eiki Kouroki, Kazuhiko Takeno, Naoki Naruse
  • Mobile phone
    Publication number: 20010044298
    Abstract: When a mobile phone is out of an area covered by a communication currently in use, the fact is noticed to a user and, simultaneously therewith, a message urging the user to select another communication system is displayed. During a period in which this display is performed, it becomes possible to switch the communication system through a simple procedure.
    Type: Application
    Filed: May 16, 2001
    Publication date: November 22, 2001
    Applicant: NEC Corporation
    Inventors: Hirokazu Tuji, Eiki Kouroki, Kazuhiko Takeno, Naoki Naruse
  • Fluid pressure operable servo positioner
    Patent number: 4125059
    Abstract: A fluid pressure operable servo positioner including a pair of operating piston units diametrally opposingly arranged relative to and abuttingly engageable with opposite sides of a mechanical operating member or lever for positioning the operating member in a preselected position determined by the degree of actuating pressure acting on the piston or pistons which are retractable by return springs, when relieved of actuating pressure acting thereon, completely out of contact with the operating member to an extent at which the operating member may be manually positioned, within a full range of positions, free of any resistance such as piston friction.
    Type: Grant
    Filed: January 14, 1977
    Date of Patent: November 14, 1978
    Assignee: The Nippon Air Brake Co., Ltd.
    Inventor: Hirokazu Tuji