Issued Patents 2024
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12152158 | Graphite lead or graphite chalk or graphite block, pencil with graphite lead, and method for producing a graphite lead or graphite chalk or graphite block | Reiner Appel, Joachim Kinzel, Silke Bachmann | 2024-11-26 |
| 12054001 | Process for the production of an impregnated wood piece, impregnated wood piece obtainable by such a process and pencil having a sheath made of such an impregnated wood piece | Vladimir Barroso, Felipe Zatt Schardosin, Tatiane de Mattos AMADIO | 2024-08-06 |
| 12006443 | Core or crayon for writing and/or coloring | Vladimir Barroso, Eder D. J. Merola | 2024-06-11 |