Patent No. EP4023451 (titled "Printing Cassette") was filed by Brother Kogyo Kabushiki Kaisha on Sep 15, 2020. The application was issued on Aug 6, 2025.

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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