Klasse 6
Manually operated metal valves for use in oil and gas wells to regulate the flow of fluid, namely, gate valves, check valves, and pipeline valvesmanually operated metal valves for use in storage, cavern, and thermal wells to regulate the flow of fluid, namely, gate valves, check valves, and pipeline valvesmetal hardware items for use in wellheads, namely, casing heads, casing spools, casing hangers, tubing heads, tubing hangers, tubing head adapters, crosses and tees, casing caps, and primary and secondary packoffsmetal hardware items for use in wellheads, namely, adapter spools, top connectors, and tree assembliesmetal hardware items for use in wellheads and valves, namely, nutsmetal flanges
Klasse 7
Wellheads in the nature of machinery for use in oil and gas wellswellheads in the nature of machinery for use in storage, cavern, and thermal wellsvalves in the nature of machinery to regulate the flow of fluid, namely, gate valves, check valves, and pipeline valvesparts of wellhead machinery, namely, primary and secondary packoffs in the nature of a seal for a wellhead, o-ringslubricators, namely, a hydraulically or mechanically operated tool mounted at the top of a wellhead and used to install or remove wellhead parts in a high pressure wellheadall the aforesaid being machines or parts of machines
Klasse 9
Christmas trees in the nature of an assembly of valves, spools, and fittings, affixed to a wellhead to control well production or injection, for use in oil and gas wellsChristmas trees in the nature of an assembly of valves, spools, and fittings, affixed to a wellhead to control well production or injection, for use in storage, cavern, and thermal wellssurface safety valves for use in oil and gas wellssurface safety valves for use in storage, cavern, and thermal wellselectric surface and subsurface safety valve control panelsautomatic valves for use in oil and gas wells, namely, gate valves, check valves, and pipeline valves for safety useautomatic valves for use in storage, cavern, and thermal wells, namely, gate valves, check valves, and pipeline valves for safety useemergency shut down valves for use in oil and gas, storage, cavern, and thermal wellscontrol panels for use in equipment for oil and gas, storage, cavern, and thermal wellsmetal test plugs for use in wellhead equipment
Klasse 37
Installation, repair and maintenance of equipment, machinery, and parts thereto, for oil and gas, storage, cavern, and thermal wells