U.S. federal trademark · Serial No. 74646642 · Reg. No. 1983736
medical and dental gases, namely nitrous oxide, cyclopropane, ethylene, oxygen-carbon dioxide combination, oxygen-helium conbination, and oxygen
industrial gases, namely oxygen, nitrogen, acetylene, argon, helium, welding grade CO2, hydrogen propane, deuterium, silane, oxygen-- argon combination and liquified natural gas
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