Issued Patents All Time
Showing 26–50 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8431954 | Light emitting device employing non-stoichiometric tetragonal alkaline earth silicate phosphors | Chung Hoon Lee, Gundula Roth, Stefan Tews | 2013-04-30 |
| 8318044 | Light emitting device | Chung Hoon Lee, Gundula Roth | 2012-11-27 |
| 8308980 | Light emitting device | Chung Hoon Lee, Gundula Roth | 2012-11-13 |
| 8273266 | Copper-alkaline-earth-silicate mixed crystal phosphors | Gundula Roth, Chung Hoon Lee | 2012-09-25 |
| 8252203 | Luminescent material | Gundula Roth, Chung Hoon Lee | 2012-08-28 |
| 8173042 | Strontium oxyorthosilicate phosphors having improved stability under a radiation load and resistance to atmospheric humidity | Chung Hoon Lee, Gundula Roth, Detlef Starick | 2012-05-08 |
| 8158028 | Luminescent material | Gundula Roth, Chung Hoon Lee | 2012-04-17 |
| 8137589 | Non stoichiometric tetragonal copper alkaline earth silicate phosphors and method of preparing the same | Chung Hoon Lee, Gundula Roth, Stefan Tews | 2012-03-20 |
| 8134165 | Light emitting device employing non-stoichiometric tetragonal alkaline earth silicate phosphors | Chung Hoon Lee, Gundula Roth, Stefan Tews | 2012-03-13 |
| 8089084 | Light emitting device | Gundula Roth, Chung Hoon Lee | 2012-01-03 |
| 8075802 | Luminescent material | Gundula Roth, Chung Hoon Lee | 2011-12-13 |
| 8070983 | Luminescent material | Gundula Roth, Chung Hoon Lee | 2011-12-06 |
| 8070984 | Luminescent material | Gundula Roth, Chung Hoon Lee | 2011-12-06 |
| 8071988 | White light emitting device comprising a plurality of light emitting diodes with different peak emission wavelengths and a wavelength converter | Chung Hoon Lee, Gundula Roth | 2011-12-06 |
| 8066909 | Light emitting device | Gundula Roth, Chung Hoon Lee | 2011-11-29 |
| 7928466 | Light emitting semi-conductor diode (with high light output) | Hermann Oppermann, Julius Muschaweck, Jochen Kunze, Thomas Luce, Eike Krochmann +1 more | 2011-04-19 |
| 7828993 | Phosphor and optical device using same | Gundula Roth | 2010-11-09 |
| 7679101 | Light emitting device | Koichi Ota, Atsuo Hirano, Akihito Ota, Stefan Tasch, Peter Pachler +3 more | 2010-03-16 |
| 7554129 | Light emitting device | Gundula Roth, Chung Hoon Lee | 2009-06-30 |
| 7382033 | Luminescent body and optical device including the same | Gundula Roth | 2008-06-03 |
| 7259396 | Light source with a light-emitting element | Stefan Tasch, Peter Pachler, Gundula Roth, Wolfgang Kempfert, Detlef Starick | 2007-08-21 |
| 7187011 | Light source with a light-emitting element | Stefan Tasch, Peter Pachler, Gundula Roth, Wolfgang Kempfert, Detlef Starick | 2007-03-06 |
| 7157746 | Light emitting device having a divalent-europium-activated alkaline earth metal orthosilicate phosphor | Koichi Ota, Atsuo Hirano, Akihito Ota, Stefan Tasch, Peter Pachler +3 more | 2007-01-02 |
| 7138660 | Light emitting device | Koichi Ota, Atsuo Hirano, Akihito Ota, Stefan Tasch, Peter Pachler +3 more | 2006-11-21 |
| 6943380 | Light emitting device having phosphor of alkaline earth metal silicate | Koichi Ota, Atsuo Hirano, Akihito Ota, Stefan Tasch, Peter Pachler +3 more | 2005-09-13 |