Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4805574 | Ignition timing control system for an internal combustion engine | Katsuhiko Sakamoto, Yoshinori Okino | 1989-02-21 |
| 4803961 | Air suction devices for multicylinder engines | Tetsuo Hiraoka, Shinji Seike, Minoru Akizuki | 1989-02-14 |