for educational services, namely, instructional seminars in the field of heating, ventilating and air conditioning

'air':14 'condit':15 'educ':2 'field':9 'heat':11 'instruct':5 'name':4 'seminar':6 'servic':3 'ventil':12

indoor air quality control system comprising air cleaners and humidistats for heating, ventilating and air conditioning

'air':2,7,15 'cleaner':8 'compris':6 'condit':16 'control':4 'heat':12 'humidistat':10 'indoor':1 'qualiti':3 'system':5 'ventil':13

thermostats; electronic control panel for heating, ventilating, and air conditioning

'air':9 'condit':10 'control':3 'electron':2 'heat':6 'panel':4 'thermostat':1 'ventil':7

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