E - Fixed Constructions – 01 – B
Patent
E - Fixed Constructions
01
B
346/99, 341/32.1
E01B 7/24 (2006.01)
Patent
CA 1214536
ABSTRACT OF THE DISCLOSURE A control switch system for a railway switch heater with an environment probe near the switch and controlling switching on and off of the switch heater in a predetermined mode.
437465
As Represented By The Ministe R. Of The National Research Counci Her Majesty The Queen In Right Of Canada
R. William Wray & Associates
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