IP Library › Granted Patent US 5,697,460
Granted Patent Utility
US 5,697,460 · App. 08/553,382

Drill pipe for directional drilling

Inventors: Arthur Deacey Stewart, Karl Schmidt
Patented Case View Patent ↗
Granted: Dec 16, 1997 Filed: Nov 14, 1995
Inventors
Arthur Deacey Stewart
Karl Schmidt

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Quick Facts
Patent No.
US 5,697,460
App. No.
08/553,382
Filed
1995-11-14
Granted
1997-12-16
Kind
A