Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4899702 | Aluminum alloy piston and piston-ring assembly treated to suppress agglutination of the piston alloy to a piston-ring | Norio Sasaki, Yorishige Maeda | 1990-02-13 |
| 4289990 | Spark plug with a stepped insulator and an inner constriction in the housing | Katsumi Suzuki, Fujio Tsuboi | 1981-09-15 |