Weatherford Counterclaims Live In Tesco Patent Suit

Law360, New York (March 2, 2009, 12:00 AM EST) -- A federal judge has refused to dismiss oil field services company Weatherford International Inc.'s counterclaims against Tesco Corp. in a fight over drilling technology patents.

Judge Keith P. Ellison's ruling Thursday in the U.S. District Court for the Northern District of Texas also allowed Tesco to revise its accusations against another defendant, Frank's Casing Crew and Rental Tools Inc.

Tesco's complaint involves U.S. Patent Number 7,140,443, titled “Pipe handling device, method and system,” which was assigned to Tesco in November 2006, according to the suit....
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