CHRISTENSEN
Filed: July 13, 1962
Drilling and Cutting Equipment-Namely, Drill Bits, Core Bits, Core Barrels, Reamers and Washover Shoes, Used in Subsurface…
Owned by: Christensen Inc.
Serial Number: 72148955
Image Trademark
Filed: March 15, 1976
NATURAL AND SYNTHETIC DIAMONDS
Owned by: Christensen Inc.
Serial Number: 73080354
HYDRO-SLEEVE
Filed: April 9, 1976
OIL WELL DRILL STRING STABILIZERS
Owned by: Christensen Inc.
Serial Number: 73083280
ROCKYBACK
Filed: April 9, 1976
OIL WELL DRILL STRING STABILIZERS
Owned by: Christensen Inc.
Serial Number: 73083281
POWER-TORQUE
Filed: August 4, 1978
MACHINES FOR MAKING AND BREAKING THREADED PIPE CONNECTIONS
Owned by: Christensen Inc.
Serial Number: 73181064
SPEED-MILL
Filed: September 24, 1979
Subsurface Cutting Tools-Namely, Milling Tools, for Cutting Openings Through the Walls of Oil Well Casing Disposed in Well…
Owned by: Christensen Inc.
Serial Number: 73232442
CHRISDRIL
Filed: October 14, 1980
Drilling and Cutting Tools and Equipment-Namely, Drill Bits and Core Bits Used in Mining and Mineral Exploration
Owned by: Christensen Inc.
Serial Number: 73281553
ROCKUT
Filed: November 19, 1981
Drill Bit for Well Drilling
Owned by: Christensen Inc.
Serial Number: 73337876
