Patents by Inventor Jichuang Xu

Jichuang Xu 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).

  • Entry and exit confirmation system and method
    Patent number: 7764176
    Abstract: A method for confirming entry and/or exit state of a mobile object relative to all entrance of an underground passageway by utilizing Radio Frequency Identification (RFID) technology. At least one RFID tag is physically attached to the mobile object. At least a first RFID reader and a second RFID reader, each having a monitoring range and being in communication with the RFID tag, are disposed at the entrance and a relatively inner position of the passageway respectively.
    Type: Grant
    Filed: December 14, 2007
    Date of Patent: July 27, 2010
    Assignee: Honeywell International Inc.
    Inventors: Kailai Zhang, Jichuang Xu, Wenhao Qin