CAFC Rejects Claim Construction on Plain Meaning when Context Leads to a Different Interpretation

The district court erred by relying entirely on the plain meaning of the claim where context-based interpretations were necessary. The Court held that the plural terms “intervals” and “remotes” in isolation could mean what must occur during each interval and what was applicable to all the remotes, but there was no requirement indicated in the remaining claim language or specification that at least one remote transmit and receive frames during at least one interval. The Court held that this evidence, together with other language in claim 21, and teachings in the specification, showed that each cycle in the claims must have intervals in which remotes were allowed to transmit.