Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9871199 | Light emissive plastic glazing having a multilayered configuration for illuminating passenger compartment | Robert Schwenke, Wilfried Hedderich, Chengtao Li, Ken Foster | 2018-01-16 |
| 9315148 | Light emissive plastic glazing | Robert Schwenke, Wilfried Hedderich, Chengtao Li, Ken Foster | 2016-04-19 |
| 8361601 | Plastic glazing panel having UV curable printed pattern and process for making the same | Nandakumar Menon, Korey Stellmach, Sunitha Grandhee, Keith D. Weiss, Ken Foster | 2013-01-29 |
| 7573630 | Photochromatic effect for polycarbonate glazing applications | Wilfried Hedderich, Keith D. Weiss | 2009-08-11 |