74385474
May 3, 1993
Aug 8, 1995
central controllers, remote terminals and transmitters and receivers for building management apparatus used for controlling and communicating between installed electrical appliances within a building; transmitters and receivers for communicating data using the telephone network; energy management controllers and thermostat devices for controlling heating, ventilating, or cooling apparatus within a building; burglar alarms; entry phones and intercoms; and parts for the aforesaid goods; all included
Electrical and Scientific Apparatus