Holding that "the district court must consider whether the testimony will assist the trier of fact with its analysis of any of the issues involved in the case"
Holding that evidence relying on "25 percent rule of thumb," which was a tool used to approximate the reasonable royalty rate the manufacturer of patented product would be willing to offer to pay to the patentee during a hypothetical negotiation, was inadmissible under Daubert since it failed to tie a reasonably royalty base to facts of case at issue
Holding that the district court did not err in concluding that terms had plain meanings that did not require construction and in rejecting one party's proposed construction, which erroneously read limitations into the claims
Holding that under Rule 103 of the Federal Rules of Evidence, once a court makes a definitive evidentiary ruling on the record, a party need not renew an objection to preserve appeal rights
Holding "patentee may obtain lost profit damages for that portion of the infringer's sales for which the patentee can demonstrate 'but for' causation and reasonable royalties for any remaining infringing [sales]"; further holding patentee may also recover for "[r]eduction of [its] prices, and consequent loss of profits, enforced by infringing competition"