Continuing in the vein of last week's discussion of claim narrowing, Judge Andrews issued an interesting opinion on Friday discussing the number of invalidity arguments a defendant was allowed to present at trial.
Although we still occasionally see orders in the district limiting the number of prior art references a defendant is allowed to assert, it has become increasingly common in recent years to see the Court limit the number of prior art arguments or combinations or defenses an accused infringer can assert -- either instead of, or in addition to, a set number of references.
The question of how to count "arguments" has generated a fair amount of opinions in the district, with slightly varying results. Judge Burke gave …