Patent No. EP2503912 (titled "An Electrically Heated Smoking System With Internal Or External Heater") was filed by Philip Morris on Nov 26, 2010. The application was issued on Nov 27, 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 |
|---|---|---|
| JT | Jan 4, 2019 | KAZI |
| JAPAN TOBACCO | Jan 4, 2019 | HOFFMANN EITLE |
| NICOVENTURES | Jan 4, 2019 | 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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