Patent No. EP3502353 (titled "Foundation Building System For An Offshore Wind Turbine And Method For Installation Of An Offshore Wind Turbine") was filed by Siemens Gamesa Renewable Energy on Dec 22, 2017. The application was issued on Apr 21, 2021.

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.
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.
Date
Description
Get instant alerts for new documents