U.S. federal trademark · Serial No. 88403676 · Reg. No. 018041116
(Based on 44(e)) (Based on Use in Commerce) Heat exchangers not being parts of machines; (Based on 44(e)) Heating elements; Heating conductors in the nature of heating elements; Structural parts for heating elements, heating conductors in the nature of heating elements, and heat exchangers not being parts of machines
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