Patents by Inventor Dai Kawarai

Dai Kawarai 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).

  • Tag detecting system, moving object detecting method, and entrance/exit management system
    Patent number: 8248204
    Abstract: A tag detecting system for detecting a movement of a person or an object that mounts an RFID tag, a moving object detecting method, and an entrance/exit management system using the moving object detecting system are provided. The tag detecting system detects a specific person or object by restricting a detection area of the RFID tag to a narrow area. Since the moving object detecting method detects a piggyback, the entrance/exit system prevents the piggyback even if there are a number of persons passing through an entrance/exit gate almost at the same time.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: August 21, 2012
    Assignees: Hitachi, Ltd., Hitachi Engineering & Services Co., Ltd., Matrix Inc.
    Inventors: Masahiro Takeshima, Kazuo Tamura, Takeshi Kawahara, Masayoshi Kondou, Dai Kawarai