IP Library › Granted Patent US 5,848,643
Granted Patent Utility
US 5,848,643 · App. 08/770,719

Rotating blowout preventer

Inventors: William L. Carbaugh, Sylvester A. Joan
Patented Case View Patent ↗
Granted: Dec 15, 1998 Filed: Dec 19, 1996
Inventors
William L. Carbaugh
Sylvester A. Joan
Assignee (at issue)
Hydril Company

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Quick Facts
Patent No.
US 5,848,643
App. No.
08/770,719
Filed
1996-12-19
Granted
1998-12-15
Kind
A