Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8899200 | Valve spring retainer for an internal combustion engine and a method of manufacturing the same | Takayuki Aoki | 2014-12-02 |
| 6341588 | Valve spring retainer and a valve operating mechanism | Haruki Kobayashi, Makoto Abe | 2002-01-29 |
| 6338325 | Valve operating mechanism of an internal combustion engine | Haruki Kobayashi, Tatsuo Kanzaki, Makoto Abe | 2002-01-15 |
| 6311661 | Valve spring retainer and a valve operating mechanism | Haruki Kobayashi, Makoto Abe | 2001-11-06 |
| 6293240 | Valve spring retainer and a valve operating mechanism | Haruki Kobayashi, Makoto Abe | 2001-09-25 |