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SMITH INTERN., INC. v. HUGHES TOOL CO.

No. 80-5199.

664 F.2d 1373 (1982)

SMITH INTERNATIONAL, INC., a California Corporation, Plaintiff-Appellee, v. HUGHES TOOL COMPANY, a Delaware Corporation, Defendant-Appellant.

United States Court of Appeals, Ninth Circuit.

Decided January 7, 1982.

Rehearing Denied February 22, 1982.

Attorney(s) appearing for the Case

Edward A. Haight, Haight, Hofeldt, Davis & Jambor, Chicago, Ill., for defendant-appellant.

Andrew J. Belansky, Christie, Parker & Hale, Pasadena, Cal., for plaintiff-appellee.

Before GOODWIN, NELSON and REINHARDT, Circuit Judges.

GOODWIN, Circuit Judge.

Hughes Tool Co. appeals a declaratory judgment which held two patents invalid for obviousness, for anticipation by prior art, and for failure to properly claim the patentable art.

A. Rotary Drilling Problem.

Rotary drilling for oil and gas wells uses a rock bit threaded onto a drill pipe "string" which is lowered into a hole and rotated. The rock bit, in addition to having a "head" for such threading, has three rotatable...

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