U.S. federal trademark · Serial No. 87813025 · Reg. No. 5631180
Ducts of metal for air-conditioning installations; Ducts of metal for ventilating and air-conditioning installations; Ducts of metal for ventilating installations; Ducts of metal, for central heating installations; Metal air conditioning ducts; Ventilating ducts of metal; all of the foregoing comprised in whole or substantial part of copper
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