Detector for duct channel

Details Detector for duct channel Detector for duct channel

2007-10-23

2007-10-23

Spear, Robert M. (Department: 2913)

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Alarm or control thereof

Design Patent

active

29234614

CLAIM:
The ornamental design for detector for duct channel, as shown and described.

REFERENCES:
patent: D253400 (1979-11-01), Vander Wilt
patent: D253525 (1979-11-01), Wilson
patent: D275187 (1984-08-01), Skarman
patent: D279769 (1985-07-01), Thornton et al.
patent: D283407 (1986-04-01), Fenne
patent: D314719 (1991-02-01), Gardner
patent: D368041 (1996-03-01), Skog
“Uniguard UG-2-A2 Stand-Alone-Unit. Smoke detector for duct installation.” Calectro, Sweden.
“A-Sense and UG-A-Sense. Carbon dioxide and temperature sensor. Duct or room installation.” Calectro, Sweden.
Screenshot from http://www.calectro.com, showing Applicants previous UNIGUARD® models.

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