Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5167507 | Teaching clock having indicia carrier allowing curvilinear translation of indicia | David John Cragie | 1992-12-01 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5167507 | Teaching clock having indicia carrier allowing curvilinear translation of indicia | David John Cragie | 1992-12-01 |