Patent No. EP2921064 (titled "Intelligent Controller And Method For Electronic Cigarette") was filed by Joyetech Changzhou Electronics on Dec 14, 2012. The application was issued on Jan 23, 2019.

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 |
|---|---|---|
| ADAMSON JONES | Oct 23, 2019 | J A KEMP |
| HOFFMANN EITLE | Oct 23, 2019 | WEICKMANN & WEICKMANN PARTMBB |
| KELTIE | Oct 23, 2019 | MOORE |
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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