Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7243596 | Spacer expander | Miyuki Usui, Masahiro Nakazawa | 2007-07-17 |
| 6834861 | Two piece oil control ring with nitrided surface layers | Akiyoshi Takizawa | 2004-12-28 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7243596 | Spacer expander | Miyuki Usui, Masahiro Nakazawa | 2007-07-17 |
| 6834861 | Two piece oil control ring with nitrided surface layers | Akiyoshi Takizawa | 2004-12-28 |