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The patent EP2481141 was granted to Powerkiss on Apr 3, 2024. The application was filed on Sep 22, 2010 under application number EP10818465A. The patent is currently recorded with a legal status of "Patent Maintained As Amended".
Wireless power transfer system for inductive power supplies that enables efficient power delivery to mobile devices through an inductive link. The system utilizes an inductive link between the primary and secondary coils to transfer power while maintaining precise control over the output voltage. The link enables continuous power transfer from the primary coil to the secondary coil, eliminating the need for separate regulators and enabling real-time load monitoring. The system employs load sensing through capacitive measurement to detect changes in the secondary coil's load, and the power signal is modulated using Load Shift Keying (LSK) to optimize power transfer based on the load condition.
Latest UPC cases involving this patent.
| Case Number | Filing Date | Plaintiff | Proceeding Type |
|---|---|---|---|
| UPC_CFI_197/2025 | Mar 6, 2025 | Powermat | Infringement |

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 | Opposition Status |
|---|---|---|---|
| IKEA SUPPLY | Oct 22, 2019 | INDUSTRIPATENT I VAXJO | ADMISSIBLE |
Patent citations refer to prior patents cited during different phases such as opposition or international search.
| Citation Phase | Publication Number |
|---|---|
| DESCRIPTION | DE29816725U |
| DESCRIPTION | EP2086085 |
| DESCRIPTION | US2007216392 |
| DESCRIPTION | US2008211455 |
| DESCRIPTION | US2008231120 |
| DESCRIPTION | US2009108805 |
| DESCRIPTION | US6184651 |
| DESCRIPTION | US6636146 |
| DESCRIPTION | US7382636 |
| INTERNATIONAL-SEARCH-REPORT | EP2086085 |
| INTERNATIONAL-SEARCH-REPORT | US2008211455 |
| INTERNATIONAL-SEARCH-REPORT | US2009108805 |
| INTERNATIONAL-SEARCH-REPORT | US6636146 |
| OPPOSITION | DE2634303 |
| OPPOSITION | EP0533247 |
| OPPOSITION | US2006069412 |
| OPPOSITION | US5713939 |
| OPPOSITION | US6912137 |
| SEARCH | DE29816725U |
| SEARCH | US2007182367 |
| SEARCH | US2007216392 |
| SEARCH | US2008231120 |
| SEARCH | US2009175060 |
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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Description
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Copy of the international search report
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Published international application - A1
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