Patent No. EP4248278 (titled "Timepiece Member Comprising At Least One Spring Leaf") was filed by Patek Philippe Genve on Nov 16, 2021. The application was issued on Sep 27, 2023.

The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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