A district court must construe all disputed claim terms when the meaning of the terms affects the scope of the claims. The doctrine of equivalents does not apply if the objectively apparent reason for a narrowing amendment is not tangential to an alleged equivalent as indicated by clear claim language.
Results for Markman hearing
1) Knowledge of the accused product provides a “context” for claim interpretation.
2) The term ‘a’ means ‘one or more’ when used in a claim, including the preamble.
3) A party is not necessarily blocked from changing a position upon appeal.