Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4717493 | Preparation of magnetic coating | Duncan W. Frew, Zorro Stefanini, Leo di Ricco | 1988-01-05 |
| 4547534 | Method to disperse fine solids without size reduction | Leo di Ricco, Zorro Stefanini, Duncan W. Frew | 1985-10-15 |
| 4419257 | Magnetic coating composition | Duncan W. Frew, Zorro Stefanini, Leo di Ricco | 1983-12-06 |