Valves, sliding valves, taps, and clack valves all being parts of machines; pressure reducers as parts of machines; pressure valves as parts of machines; power-operated valves, taps and clack valves all being parts of machines; machine parts, namely, hydraulic, pneumatic, electric and electromagnetic drives for valves, sliding valves, taps and clack valves all being parts of machines; valves, slides, taps and clack valves all being parts of machines; valves for pumps; mechanical control valve...

Petroleum industry chemicals, namely, a drilling fluid additive for use in the oil and gas well drilling industry