Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8794797 | Hybrid illuminator | — | 2014-08-05 |
| 8622571 | LED tube and a lighting fixture arrangement having a safety unit | Yrjö Hartikka | 2014-01-07 |
| 8624509 | LED tube and lamp arrangement | Yrjö Hartikka | 2014-01-07 |
| 8610361 | LED tube and lighting fixture arrangement | Yrjö Hartikka | 2013-12-17 |
| 7090375 | Arrangement in connection with a lighting fixture, and a lighting fixture | — | 2006-08-15 |
| 7075249 | Arrangement in connection with a coupling device of a fluorescent lamp | Yrjö Hartikka | 2006-07-11 |
| 6929382 | Lighting fixture | — | 2005-08-16 |
| 6752521 | Lighting arrangement for public transport vehicles | — | 2004-06-22 |
| 6555973 | Arrangement in connection with discharge lamp | — | 2003-04-29 |
| 6243017 | Method and arrangement for determining remaining operating life of fluorescent lamp | — | 2001-06-05 |
| 5806616 | Arrangement in a rock drilling equipment | Pentti Enlund, Juha Piipponen, Seppo Peltola | 1998-09-15 |