Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859123 | Insert boring tool | Yuzo Koesashi, Yasuhiko Kawade | 1989-08-22 |
| 4820905 | Carbonizing furnace | Makoto Sugiyama, Motohisa Miyauchi | 1989-04-11 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859123 | Insert boring tool | Yuzo Koesashi, Yasuhiko Kawade | 1989-08-22 |
| 4820905 | Carbonizing furnace | Makoto Sugiyama, Motohisa Miyauchi | 1989-04-11 |