Building construction and repair Trademarks Filed in November 6, 1979
DSI DRILLERS SERVICE, INC.

DSI DRILLERS SERVICE, INC.

Filed: November 6, 1979
Maintenance, Repair and Rebuilding Services in the Field of Well-Drilling Equipment, Machines, Tools and Accessories
Owned by: Drillers Service, Inc.
Serial Number: 73238158

DSI

DSI

Filed: November 6, 1979
Portable Drilling Rigs
Owned by: Drillers Service, Inc.
Serial Number: 73238161

BISCHOFF

BISCHOFF

Filed: November 6, 1979
Installation and Assembly of Fluid Processing Equipment to the Order and Specification of Others
Owned by: Gottfried Bischoff Bau kompl. Gasreinigungs- und Wasserruckkuhlanlagen GmbH & Co. KG
Serial Number: 73238179