In decision UPC_CFI_292/2023, the Local Division (LD) Munich of 20/12/2023, the UPC rejected a request for a preliminary injunction. According to the first headnote of the decision, claim amendments made during prosecution can aid the claim construction . In the decided case, the LD Munich was of the opinion that a claim amendment introduced during prosecution defined an original claim feature in greater specificity and, thus, had to be construed more narrowly than suggested by claimant.
In an article published on LinkedIn, a fellow German patent attorney remarked that he considers the first headnote of this decision to represent a significant change as compared to the national German claim construction practice. I don’t think that the decision of the LD Munich is a significant departure from German national practice. While German courts have traditionally not relied on file history estoppel, several decisions handed down by the German Federal Supreme Court (BGH) in recent years – such as BGH decision of 14/06/2016 – X ZR 29/15 – Pemetrexed and BGH decision of 10/05/2011 – X ZR 16/09 – Okklusionsvorrichtung (“occlusion device”) – held that claim amendments made during prosecution can be a useful tool for claim construction. The decision by the LD Munich appears to be in line with this German national case law (which in itself represents a shift towards the national practice of other EPC contracting states that apply the principles of file history estoppel).