Method and device for carrying out the protected detection...

Details Method and device for carrying out the protected detection... Method and device for carrying out the protected detection...

2005-03-08

2005-03-08

Trieu, Van T. (Department: 2636)

Communications: electrical

Condition responsive indicating system

Specific condition

C340S603000, C119S215000

Reexamination Certificate

active

06864797

ABSTRACT:
The method according to the invention consists in providing two containers fed by the water source whose pollution is desired to be measured, each of the containers containing fish and being equipped with a detector able detect any abnormal behaviour of the fish, alternate the lighting and obscurity periods for said two containers, carry out the detection of the behaviour of the fish in the two containers and trigger an alarm signal when the detection shows an abnormal behaviour of the fish.

REFERENCES:
patent: 3805224 (1974-04-01), Wenz
patent: 4626992 (1986-12-01), Greaves et al.
patent: 4805337 (1989-02-01), Kurata
patent: 5903305 (1999-05-01), Yamamoto
patent: 6058763 (2000-05-01), Shedd et al.
patent: 2 573 875 (1986-05-01), None
patent: 2 769 713 (1999-04-01), None
patent: 2 769 714 (1999-04-01), None
patent: 2003139764 (2003-05-01), None

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