IP Library › Granted Patent US 6,761,821
Granted Patent Utility
US 6,761,821 · App. 10/205,008

Clamping-hook ring

Inventors: Michael D. Appel, Ross van Someren, Richard Kalar
Patented Case View Patent ↗
Granted: Jul 13, 2004 Filed: Sep 23, 2002
Inventors
Michael D. Appel
Ross van Someren
Richard Kalar
Assignee (at issue)
Weatherford/Lamb, Inc.

This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.

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Quick Facts
Patent No.
US 6,761,821
App. No.
10/205,008
Filed
2002-09-23
Granted
2004-07-13
Kind
B2