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KESZTHELYI v. DOHENY STONE DRILL CO.

47 F.2d 648 (1931)

KESZTHELYI v. DOHENY STONE DRILL CO.

District Court, S. D. California, Central Division.

February 23, 1931.

Attorney(s) appearing for the Case

Charles C. Montgomery, of Los Angeles, Cal., for plaintiff.

Wellborn, Wellborn & Wellborn and Wm. L. Connor, all of Los Angeles, Cal., for defendant.

COSGRAVE, District Judge.

On November 20, 1923, letters patent No. 1,474,905 were issued to plaintiff for a new and useful improvement in tool joints used in rotary drilling of oil wells.

Plaintiff explains in his specifications that in rotary drilling the bit cutting the formation is carried at the lower end of the string of drill pipe. To withdraw the bit it is necessary to pull the drill pipe, uncoupling it at intervals, ordinarily of four lengths of the...

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