Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5271301 | Vibrating cutting tool | Masaaki Hiraoka, Yasuo Umemura, Osamu Date, Tsutomu Aoki, Hitomi Nakai | 1993-12-21 |
| 5143493 | Vibrating cutting tool | Kozo Najima, Hirohumi Tsuyuguchi, Tsutomu Aoki, Masahiro Ida | 1992-09-01 |