Patent No. EP3605784 (titled "Supporting Device With Energy Accumulator And Electric Converter") was filed by Wacker Neuson Produktion on Jul 30, 2019. The application was issued on Mar 29, 2023.
A portable power system for electric tools and machines that eliminates the need for an additional frequency converter while maintaining the same level of performance. The system comprises a battery backpack with an integrated power management system, a converter device that converts DC power from the battery to AC power, and an electrical connection device that connects the power system to the tool or machine. The system features automatic power switching between the battery and converter, with the converter automatically switching to AC power when a tool or machine is connected.

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 |
|---|---|---|
| STANLEY BLACK & DECKER | Jan 2, 2024 | SBD IPADMIN |
| HUSQVARNA | Dec 20, 2023 | - |
| MILWAUKEE ELECTRIC TOOL | Dec 20, 2023 | GRUNECKER PATENT |
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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