IP Library › Granted Patent US 4,893,677
Granted Patent Utility
US 4,893,677 · App. 07/278,898

Guidelineless reentry system with retracting rollers

Inventors: Norman Brammer, Charles E. Jennings
Patented Case View Patent ↗
Granted: Jan 16, 1990 Filed: Dec 2, 1988
Inventors
Norman Brammer
Charles E. Jennings
Assignee (at issue)
Vetco Gray, LLC

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Quick Facts
Patent No.
US 4,893,677
App. No.
07/278,898
Filed
1988-12-02
Granted
1990-01-16
Kind
A