Patent No. EP3410876 (titled "Aerosol-Generating Device Having Multiple Power Supplies") was filed by Philip Morris on Jan 11, 2017. The application was issued on Apr 1, 2020.

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 | Dec 30, 2020 | DOMPATENT VON KREISLER SELTING WERNER |
| JAPAN TOBACCO | Dec 30, 2020 | DOMPATENT VON PATENT UND RECHTSANWALTEN |
| JT | Dec 30, 2020 | DOMPATENT VON KREISLER SELTING WERNER VON PATENT UND RECHTSANWLTEN |
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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