Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4382819 | Drawing and coloring element in form of blackboard-chalk-like stick for producing pictures that can be fixed through application of heat | — | 1983-05-10 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4382819 | Drawing and coloring element in form of blackboard-chalk-like stick for producing pictures that can be fixed through application of heat | — | 1983-05-10 |