Communications: electrical – Condition responsive indicating system – With particular coupling link
Reexamination Certificate
2005-11-08
2005-11-08
Pope, Daryl C (Department: 2632)
Communications: electrical
Condition responsive indicating system
With particular coupling link
C340S539110, C340S539130, C340S573100
Reexamination Certificate
active
06963277
ABSTRACT:
A behavior of a group of persons is monitored. Each person is given a radio frequency identification tag. Tag identification information that is unique to the radio frequency identification tag, and reader identification information that is unique to a tag reader, which detects the radio frequency identification tag, are acquired. A position of each of the persons in the group is detected based on the tag identification information and the reader identification information. A position of majority of the persons in the group is regarded as the position of the group. If the position of a person is different from the position of the group, then that person is determined as having parted from the group.
REFERENCES:
patent: 6437696 (2002-08-01), Lemelson et al.
patent: 11-249778 (1999-09-01), None
Aisu Hideyuki
Imasaki Naoki
Nishikawa Takeichiro
Tanaka Toshiaki
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