IC 011. US 013 021 023 031 034. G & S: Fabric air dispersion ducts for distributing and dispensing air as part of a HVAC system; metal diffuser boxes sold as a component part of an HVAC unit. FIRST USE: 19791231. FIRST USE IN COMMERCE: 19791231
IC 017. US 001 005 012 013 035 050. G & S: Insulating sleeves for HVAC air dispersion ducts. FIRST USE: 19791231. FIRST USE IN COMMERCE: 19791231
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