Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1984-06-18
1987-02-10
Rowland, James L.
Communications: electrical
Condition responsive indicating system
Specific condition
340506, 340523, G08B 1300
Patent
active
046426124
ABSTRACT:
The present invention discloses a staged system for both detecting and deterring intruders into a closed space such as a home or business. The staged system provides varying responses according to the degree of penetration of the intruder into the protected area.
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Rowland James L.
Tumm Brian R.
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