Sensor system, and sensor apparatus and reception apparatus...

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system

Reexamination Certificate

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Details

C250S338100, C340S541000, C340S552000

Reexamination Certificate

active

07026601

ABSTRACT:
For a carrier wave carrying a microwave from an MW sensor1, pulse intervals are varied between when the MW sensor1generates an alert and when the MW sensor1does not generate an alert. When checking a sensing area, an operator carries a receiver being able to receive a transmitted wave from the MW sensor1, walks around an area thought to be the sensing area and checks a monitor screen of the receiver. In this way, the sensing area can be checked at hand by the operator.

REFERENCES:
patent: 2003/0122514 (2003-07-01), Mercier et al.
patent: 2004/0032326 (2004-02-01), Nakamura et al.
patent: 2002-55173 (2002-02-01), None
patent: 2003-207462 (2003-07-01), None

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