Federal Circuit highlights limitations to claim construction when essential structure is only found in preamble
Joanna Chen The Federal Circuit has ruled on an important issue surrounding the claim construction of a preamble of a patent claim in Simo Holdings Inc v Hong Kong Ucloudlink Network Technology Ltd (2019-2411 (5 January 2021)). The key takeaway is that, in addition to being limiting when a claim preamble serves as an antecedent basis for a claim term appearing in the body of the claim, a preamble can also be limiting when it supplies “essential structure” and the body of the claim does not define “a structurally complete invention”. The...