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LEES-BRADNER CO. v. NATIONAL TOOL CO.

No. 5683.

52 F.2d 782 (1931)

LEES-BRADNER CO. v. NATIONAL TOOL CO.

Circuit Court of Appeals, Sixth Circuit.

October 8, 1931.

Attorney(s) appearing for the Case

H. F. Lyman, of Boston, Mass. (Fish, Richardson & Neave, of Boston, Mass., and Harvey R. Hawgood, of Cleveland, Ohio, on the brief), for appellant.

A. J. Hudson, of Cleveland, Ohio (S. J. Kornhauser and Kwis, Hudson & Kent, all of Cleveland, Ohio, on the brief), for appellee.

Before DENISON, MOORMAN and HICKENLOOPER, Circuit Judges.

DENISON, Circuit Judge.

This infringement suit is based upon two patents, relating to machines for grinding gear teeth by generating the appropriate involute curve thereon. The patents in suit are Lees, 1,390,145, September 6, 1921, and Schurr, 1,462,985, July 24, 1925. The District Court held each patent invalid for want of invention.

In each patent the device comprises a longitudinally reciprocating table, a rotatable gear-holding spindle mounted thereon...

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