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In the U.S., a prosecution history of a patent (i.e., the
proceedings between the patent applicant and the USPTO from
application filing to patent issuance) comes into play in the
context of claim construction (for example, before a district
court, before the PTAB in a post-grant proceeding, or in the eyes
of a third party analyzing the patent for freedom to operate
reasons), and also in the context of an assessment of infringement
under the doctrine of equivalents. The Federal Circuit has