Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836848 | Fe-based sintered alloy for valve seats for use in internal combustion engines | Osamu Mayama | 1989-06-06 |
| 4794998 | Structure for securely connecting a driven sprocket to the driven axle of a motorcycle | Toshiyuki Iwai | 1989-01-03 |