Issued Patents 2021
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11137119 | Tubular device for fitting to a tubular light fitting | Tian Xiang Wen, Feng Ju, Frits Tobi De Jongh, Han Lu, PIETER JOHANNES STOBBELAAR | 2021-10-05 |
| 11118773 | Conversion circuit between fluorescent ballast and LED | Xianhui Zhang, Frits Tobi De Jongh, Han Lu | 2021-09-14 |
| 11109470 | Tubular lighting device, luminaire and method for operating with an electronic ballast | Bernd Ackermann, Theodorus Johannes Petrus Van Den Biggelaar, PIETER JOHANNES STOBBELAAR, Henricus Theodorus Van Der Zanden | 2021-08-31 |
| 11083058 | Lighting drive, lighting system and control method | Zhi Quan Chen, Xianhui Zhang, Hui Zheng | 2021-08-03 |
| 11079073 | Tubular solid state lighting | — | 2021-08-03 |
| 11057973 | Retrofit LED lighting device having improved timing event detection for increasing stable driver operation without light flicker | Frits Tobi De Jongh, Dmytro Viktorovych Malyna | 2021-07-06 |
| 11006490 | Electronic ballast interface circuit | Xianhui Zhang, Derek Zheng, Zhi Quan Chen, Huojun Long, Wen Ran | 2021-05-11 |
| 10904972 | Retrofit light emitting diode, LED, tube for reducing audible noise originating from a high frequency electronic ballast | Zhi Quan Chen, Xianhui Zhang | 2021-01-26 |