About 3 Trademarks found that are owned by Hygrade Valve Inc.

Control valves for regulating the flow of gases and liquids; Valves for controlling and regulating the flow of gases or liquids not being parts of plumbing, heating, cooling installations or machines

Compressed air machine components, namely, cylinders, valves and air grips; Parts of oilfield wellhead machines, namely, gate valves, ball valves, check valves, plug valves, globe valves, choke and manifold industrial pumps, pump and valve parts, pipe fittings and flanges; Valves as machine components; Valves being parts of machines; Valves for pumps

Valves for controlling and regulating the flow of gases or liquids not being parts of plumbing, heating, cooling installations or machines

check valves