Proximity monitoring system

Details Proximity monitoring system Proximity monitoring system

1998-11-25

1999-11-30

Lee, Benjamin C.

Communications: electrical

Condition responsive indicating system

Specific condition

3405731, 340539, 3406911, 3406935, G08B 2300

Patent

active

059950072

ABSTRACT:
A monitoring system is provided including a portable module including a radio device. Also provided is a monitoring unit also including a radio device and an indicator for providing an indication upon the radio devices being separated a predetermined amount.

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