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VARCO, L.P. v. PASON SYSTEMS USA CORP.

No. 05-1136.

436 F.3d 1368 (2006)

VARCO, L.P., Plaintiff-Appellant, v. PASON SYSTEMS USA CORP., Defendant-Appellee.

United States Court of Appeals, Federal Circuit.

February 1, 2006.

Attorney(s) appearing for the Case

Guy E. Matthews, The Matthews Firm, of Houston, Texas, argued for plaintiff-appellant. With him on the brief was Robert M. Bowick.

Barbara Weil Laff, Ireland, Stapleton, Pryor & Pascoe, P.C., of Denver, Colorado, argued for defendant-appellee. With her on the brief was Kelley A. Bergelt.

Before CLEVENGER, RADER, and DYK, Circuit Judges.

RADER, Circuit Judge.

Varco, L.P. (Varco) owns U.S. Patent No. 5,474,142 (the '142 patent), which claims an automatic drilling system1 that controls the release of a drill string in response to a combination of four parameters (e.g., bit weight, drilling fluid pressure, drill string torque, and drill string RPM). '142 patent, col. 1, ll. 4-10. On December 22, 2003, Wildcat Services, L.P. (Wildcat), Varco's predecessor in interest, sued...

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