U.S. federal trademark · Serial No. 79210186 · Reg. No. 5521606
Oil field equipment, namely, drilling rig mechanization devices in the nature of bridge plugs, frac plugs, packers and ball sealers used in an oil and gas wellbore; [ rock drilling machines for downhole, and their ] parts and fittings * rock drilling machines for downhole * , namely, bridge plugs, frac plugs, packers and ball sealers that are used in an oil and gas wellbore; mining machines and apparatus and their parts and fittings, namely, bridge plugs, frac plugs, packers and ball sealers that are used in an oil and gas wellbore; all the foregoing goods being degradable
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