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MAGNETICS, INC. v. ARNOLD ENGINEERING COMPANY

No. 18182.

438 F.2d 72 (1971)

MAGNETICS, INC., Plaintiff-Appellant, v. The ARNOLD ENGINEERING COMPANY et al., Defendants-Appellees.

United States Court of Appeals, Seventh Circuit.

Rehearing Denied February 17, 1971.

Attorney(s) appearing for the Case

Sidney Neuman, Harry J. Roper, Chicago, Ill., Paul T. O'Neil, Raymond N. Baker, Washington, D.C., for plaintiff-appellant.

Dugald S. McDougall, Robert L. Kahn, Chicago, Ill., for defendants-appellees.

Before KILEY, FAIRCHILD, and CUMMINGS, Circuit Judges.

PER CURIAM.

Plaintiff is the owner of three patents that it sought to enforce in this action. Eyberger Reissue Patent 25,441 and Eyberger Patent 3,244,782 are apparatus and method patents for compressing metallic powder into toroidal (doughnut-shaped) cores. The third patent, Brandon-Eyberger 3,011,213, covers a machine for lubricating die cavities.

The district court's opinion held each of the patents invalid because of

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