U.S. federal trademark · Serial No. 87091517 · Reg. No. 5116298
Computer software for use in in the field of drilling oil and gas wells for controlling a surface choke, in the nature of a valve, for managing and keeping pressure levels inside an oil or gas well under control; Managed pressure drilling systems, namely, electronic control systems for oil and gas well drilling machines in the nature of annular pressure control systems in the field of oil and gas recovery
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