Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11072722 | Pencil lead | Julien Gouerec, Philippe Lefebvre, Christelle Debrauwer | 2021-07-27 |
| 10308063 | Paper pencil lead | Julien Gouerec, Philippe Lefebvre | 2019-06-04 |
| 9988546 | Colour pencil lead | Julien Gouerec, Philippe Lefebvre | 2018-06-05 |