U.S. federal trademark · Serial No. 87131927 · Reg. No. 5330812
Dumpsters, namely, metal containers for receiving, transporting and dumping collected dust; metal housings, namely, closures of metal for metal containers; removable metal stiffening frames, namely, steel frames for closures of metal; metal ducts for conveying gases in closures of metal; metal distributors, namely, metal boxes for distributing gases in closures of metal; metal manifolds for dividing gas flow into branches in closures of metal
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