Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5864959 | Drawing triangle and/or protractor, in particular for blackboard use | Nis Oellgaard | 1999-02-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5864959 | Drawing triangle and/or protractor, in particular for blackboard use | Nis Oellgaard | 1999-02-02 |