In claim construction analyses, the plain and ordinary meaning of a claim term will not be narrowed by statements in the prosecution history, unless those statements clearly and explicitly evidence the patentee’s intent to depart from the full scope of the claim. If a dependent claim includes the purportedly disclaimed subject matter and was added at the time of the purportedly disavowing statements, a finding of disavowal is unlikely. Furthermore, a means-plus-function term should clearly and objectively define the function of the limitation; if the function is a subjective term of degree, a finding that the term is indefinite is likely.
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