Patent No. EP2855066 (titled "System For And Method Of Pairing Welding Devices Wherein The Pairing Includes A Change In Welding Power And/Or Welding Consumables") was filed by Illinois Tool Works on May 30, 2013. The application was issued on May 4, 2016.

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 |
|---|---|---|
| FRONIUS | Feb 6, 2017 | ISARPATENT |
| LINCOLN | Feb 6, 2017 | GROSSE SCHUMACHER KNAUER VON HIRSCHHAUSEN SCHLOSS SCHELLENBERG |
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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