71427529
Jan 17, 1940
Dec 24, 1940
Mud Mixing Guns and Parts for the Same, Swivel Joints for Fluid Conduits and Parts for the Same, Counterbalance Swivel Joints for Fluid Conduits and Parts for the Same, and Well Machinery-Namely, Circulating Heads and Parts for the Same; [Well Reamers and Parts for the Same, Well Bits and Parts for the Same], Well Cementing Apparatus and Rotary Hose Adapters
Yarns and Threads