Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7220168 | Processes for producing a whetstone and whetstone pellets with uniform abrasion layers | — | 2007-05-22 |
| 6933018 | Processes for producing a whetstone and whetstone pellets with uniform abrasion layers | — | 2005-08-23 |
| 4272924 | Method of ultrasonic control for lapping and an apparatus therefor | Chikanobu Ichikawa | 1981-06-16 |