Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9657362 | Method for improving durability of exhaust pipe | Jouji Hagiwara, Kazuhiro Hirakawa, Norihiro Fujisawa | 2017-05-23 |
| 9464335 | Method for improving fatigue strength of cast iron material | Makoto Taguchi, Kazuhiro Hirakawa | 2016-10-11 |
| 9340846 | Method for improving fatigue strength of cast iron material | Makoto Taguchi, Kazuhiro Hirakawa | 2016-05-17 |
| 9102992 | Method for improving fatigue strength of cast iron material | Makoto Taguchi, Kazuhiro Hirakawa | 2015-08-11 |
| 4557316 | Method for manufacture of investment shell mold suitable for casting grain-oriented super alloy | Takeshi Takayanagi, Shizuo Suzuki, Susumu Minowa | 1985-12-10 |