Patent No. EP2072957 (titled "Transfer Procedure For Saved Measurement Data From Consumption Meters, Especially Heating Cost Distributors") was filed by Kundo System Technik on Nov 19, 2008. The application was issued on Dec 11, 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 |
|---|---|---|
| ISTA | Sep 11, 2020 | COHAUSZ HANNIG BORKOWSKI WISSGOTT |
| TECHEM ENERGY SERVICES | Sep 11, 2020 | KEIL & SCHAAFHAUSEN PATENTANWALTE PARTGMBB |
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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