The United States District Court, Central District of Illinois, Harold Albert Baker, J., entered judgment for defendant on infringement claim and against defendant on counterclaims, and cross appeals were taken. Particular patents or devices. Substitution of equivalents.
Claim construction is question of law which court reviews de novo.
Construction of particular claims as affected by other claims. See publication Words and Phrases for other judicial constructions and definitions. Burden is on patent owner to prove infringement by preponderance of the evidence. 291k226.7 k. Function, means, operation, and result. Clearly erroneous findings.