Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6817103 | Bonded layer protection structure for wear resistant component | Hisayasu Watanabe, Takema Isogaya | 2004-11-16 |
| 6391927 | Method for manufacturing ink follower for water base ballpoint pens | Youji Takeuchi, Kiyoshi Iwamoto, Tadashi Kamagata, Katsuhiko Shiraishi | 2002-05-21 |
| 6376560 | Ink follower for water-base ballpoint pens and method of manufacturing the same | Youji Takeuchi, Kiyoshi Iwamoto, Tadashi Kamagata, Katsuhiko Shiraishi | 2002-04-23 |
| 6227738 | Method of manufacturing ink follower for water-base ballpoint pens | Youji Takeuchi, Kiyoshi Iwamoto, Tadashi Kamagata, Katsuhiko Shiraishi | 2001-05-08 |
| 6132124 | Ink follower for aqueous ballpoint pen using gel-like material and solid piece | Kazuhiko Furukawa, Katsuhiko Shiraishi | 2000-10-17 |
| 5980166 | Rotary tool with shank | — | 1999-11-09 |
| 5897274 | Rotating boring tool | Tetsuro Mantani, Satoru Nishio | 1999-04-27 |