Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6223635 | Method of forming annular grooves in a ball polishing apparatus | Katsuhisa Tonooka, Chuichi Sato, Hiroyuki Nojima, Yuichi Sumita | 2001-05-01 |
| 5906535 | Ball polishing method and apparatus, and annular groove forming method | Katsuhisa Tonooka, Chuichi Sato, Hiroyuki Nojima, Yuichi Sumita | 1999-05-25 |
| 5251154 | Method for measuring accuracy of thread groove and system for the same | Yasutami Matsumoto, Shigemi Tsukamoto, Takashi Otani, Kunio Kawashima | 1993-10-05 |