Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D457780 | Handle for cheese grater | Charles E. Buchanan, John Szeto, William J. Calderwood | 2002-05-28 |
| D450543 | Napkin holder | Charles E. Buchanan, John Szeto, William J. Calderwood | 2001-11-20 |