Assignee
GRANT TFW INC
US·6 granted patents·128 citations·filing 1991–1994
Top patents by PatentIndex Score
6 records- 0162US5492375ADrill pipe with improved connectorsGRANT TFW INC·Filed 1994·Granted Feb 20, 1996·39 cites·5 claims
- 0255US5433130AShoulder dressing apparatusGRANT TFW INC·Filed 1993·Granted Jul 18, 1995·22 cites·22 claims
- 0350US5355968ATool joint stress relief grooveGRANT TFW INC·Filed 1993·Granted Oct 18, 1994·24 cites·14 claims
- 0442US5562312ADiscountinuous plane weld apparatus and method for enhancing fatigue and load properties of subterranean well drill pipe immediate the area of securement of pipe sectionsGRANT TFW INC·Filed 1994·Granted Oct 8, 1996·13 cites·4 claims
- 0541US5147996ATool jointGRANT TFW INC·Filed 1991·Granted Sep 15, 1992·16 cites·1 claims
- 0639US5361846AApparatus and method for enhancing fatigue properties of subterranean well drill pipe immediate the area of securement to a tool jointGRANT TFW INC·Filed 1993·Granted Nov 8, 1994·14 cites·4 claims
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