IP Library › Granted Patent US 4,902,045
Granted Patent Utility
US 4,902,045 · App. 07/128,104

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Inventors: John D. McGugan, Michael J. Mackie, Norman Buckley
Patented Case View Patent ↗
Granted: Feb 20, 1990 Filed: Dec 3, 1987
Inventors
John D. McGugan
Michael J. Mackie
Norman Buckley
Assignee (at issue)
Hunting Oilfield Services (UK) Ltd.

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Quick Facts
Patent No.
US 4,902,045
App. No.
07/128,104
Filed
1987-12-03
Granted
1990-02-20
Kind
A