Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12301131 | Method and apparatus for controlling neutral point voltage of three-phase resonant-earthed electric network | Ari Wahlroos, Janne Leminen | 2025-05-13 |
| 11831146 | Method and apparatus for use in earth-fault protection | Ari Wahlroos | 2023-11-28 |
| 11522355 | Method and apparatus for use in earth-fault protection | Ari Wahlroos | 2022-12-06 |
| 9425609 | Method and apparatus for differential protection of an electric connection | Ari Wahlroos | 2016-08-23 |
| 8981785 | Method and apparatus for detecting earth fault | Ari Wahlroos | 2015-03-17 |
| 8838402 | Method and arrangement for voltage measurement | Ari Wahlroos, Pentti Mahonen | 2014-09-16 |
| 8717036 | Method and apparatus for detecting a phase-to-earth fault | Ari Wahlroos | 2014-05-06 |
| 8081002 | Apparatus and method for determining location of phase-to-phase fault or three-phase fault | Ari Wahlroos | 2011-12-20 |
| 8044666 | Method for determining location of phase-to earth fault | Ari Wahlroos | 2011-10-25 |
| 8022709 | Method and apparatus for determining circular characteristic | Ari Wahlroos | 2011-09-20 |
| 7999557 | Method for determining location of phase-to-earth fault | Ari Wahlroos | 2011-08-16 |
| 7728600 | System and method for determining location of phase-to-earth fault | Ari Wahlroos | 2010-06-01 |
| 7514933 | System and method for determining location of phase-to-earth fault | Ari Wahlroos | 2009-04-07 |
| 7233153 | Method and system for determining location of phase-to-earth fault | Ari Wahlroos | 2007-06-19 |