Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5655956 | Rotary ultrasonic grinding apparatus and process | Placid M. Ferreira, Zhijain Pei | 1997-08-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5655956 | Rotary ultrasonic grinding apparatus and process | Placid M. Ferreira, Zhijain Pei | 1997-08-12 |