Patent No. EP1021997 (titled "Method Of Manufacture Of Dental Prostheses And Auxiliary Elements") was filed by Bego Bremer Goldschlgerei Wilh Herbst on Dec 21, 1999. The application was issued on Jul 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 |
|---|---|---|
| CADSPEED | Apr 17, 2018 | STIPPL |
| DENTAURUM | Apr 3, 2017 | HOEGER |
| S & S SCHEFTNER | Feb 20, 2017 | SCHULTHEISS & STERZEL PATENTANWALTE PARTG MBB |
| CONCEPT LASER | Dec 18, 2008 | HAFNER & KOHL PARTMBB |
| CENDRES METAUX | Feb 6, 2008 | FREI PATENT ATTORNEYS |
| SLM SOLUTIONS | Feb 6, 2008 | SCHICKER |
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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