The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 2008
Filed:
Aug. 05, 2005
Kevin Kwong-tai Chung, Princeton, NJ (US);
Cynthia Ting-wah Chu, Princeton, NJ (US);
Xiaoming Shi, Highland Park, NJ (US);
Jing Jian LI, Plainsboro, NJ (US);
Ming Zou, Hillsborough, NJ (US);
Kevin Kwong-Tai Chung, Princeton, NJ (US);
Cynthia Ting-Wah Chu, Princeton, NJ (US);
Xiaoming Shi, Highland Park, NJ (US);
Jing Jian Li, Plainsboro, NJ (US);
Ming Zou, Hillsborough, NJ (US);
Avante International Technology, Inc., Princeton Junction, NJ (US);
Abstract
A method for monitoring a container having an RFID device interior comprises periodically transmitting messages including unique identifying information and receiving messages transmitted by the RFID device interior the container by a receiving device exterior the container. Some messages transmitted when the container is closed are not received by the receiving device, and some messages transmitted when the container is not closed are received. The method comprises storing and/or relaying the received messages and determining from the number of messages received from the RFID device that are stored and/or relayed whether the container has or has not been opened. The method may also comprise transmitting the messages at two or more power levels and selecting messages that are at the lowest power level that produces at least two corresponding stored and/or relayed messages for determining the location of the RFID device.