Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9447711 | Method for production of valve head portion of hollow engine valve and hollow engine valve | — | 2016-09-20 |
| 9427795 | Method for producing a hollow engine valve | Hirokazu Morii, Kenichiro Hirao, Katsumi Nakamura | 2016-08-30 |
| 9302317 | Method for manufacturing hollow engine valve | Hirokazu Morii, Kenichiro Hirao | 2016-04-05 |
| 9194263 | Method for production of valve head portion of hollow engine valve and hollow engine valve | — | 2015-11-24 |
| 8881391 | Method for producing hollow engine valve | Hirokazu Morii | 2014-11-11 |
| 8713793 | Method for producing metallic-sodium-filled engine valve | Hirokazu Morii | 2014-05-06 |
| 8650752 | Method for manufacturing valve umbrella portion of hollow engine valve, press device of valve umbrella portion of hollow engine valve, and hollow engine valve | — | 2014-02-18 |
| 8561297 | Method for producing engine valve in which sodium metal is sealed | Kazutaka Maruyama, Hirokazu Morii | 2013-10-22 |
| 8522434 | Method for production of valve head portion of hollow engine valve and hollow engine valve | — | 2013-09-03 |
| 6471470 | Vane adjustment mechanism for variable capacity turbine, and assembling method for the same | Yoshihiro Ishihara, Takashi Mikogami | 2002-10-29 |