General Bronze Corp. v. Cupples Products Corp.

HULEN, District Judge.

Plaintiffs ask permission to file a supplemental complaint under Rule 15(d), Federal Rules of Civil Procedure, 28 U.S.C.A., by which infringement of a patent, granted subsequent to filing the original complaint, is charged against defendant. Defendants resist the move, claiming the supplemental complaint would introduce a new and independent cause of action. It is conceded it does. Should the new pleading be permitted?

The complaint charges defendants with patent infringement and unfair business practices with respect to six letters patent, *270the last one issued December 8,…