Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 8162723 | Method of polishing a tungsten carbide surface | Clifford Spiro, Frank B. Kaufman | 2012-04-24 | $8,726,000 |
| 7037175 | Method of sharpening cutting edges | Clifford Spiro, Frank B. Kaufman | 2006-05-02 | $5,250,000 |