Patent No. EP3793384 (titled "Aerosol-Generating Apparatus Including Self-Diagnostics") was filed by Philip Morris on May 14, 2019. The application was issued on Dec 4, 2024.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
| Company | Opposition Date | Representative |
|---|---|---|
| JAPAN TOBACCO | Sep 3, 2025 | GILL JENNINGS & EVERY |
| NICOVENTURES | Aug 28, 2025 | D YOUNG |
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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