Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5123386 | Internal combustion engine and its piston | Nobuaki Wakita, Shigeyuki Hori, Seizi Oomura | 1992-06-23 |
| 5039116 | Composite oil-ring | — | 1991-08-13 |
| 4985092 | Steel having good wear resistance | Hiroshi Kaede, Tadahiro KOIKE, Shinji Kato, Yoshio Fuwa, Shigetoshi Sugimoto +2 more | 1991-01-15 |
| 4966751 | Steel having good wear resistance | Hiroshi Kaede, Tadahiro KOIKE, Shinji Kato, Yoshio Fuwa, Shigetoshi Sugimoto +2 more | 1990-10-30 |
| 4899702 | Aluminum alloy piston and piston-ring assembly treated to suppress agglutination of the piston alloy to a piston-ring | Norio Sasaki, Kazuhisa Mayumi | 1990-02-13 |
| 4798391 | Three-piece oil-ring with a slot | — | 1989-01-17 |
| 4730548 | Light metal alloy piston | Yoshiaki Tatematsu, Atsuo Tanaka, Shiro Machida | 1988-03-15 |
| 4722535 | Oil ring structure having reduced rigidity | Yoshiaki Wada, Shizuo Shinada, Sumio Ono | 1988-02-02 |
| 4669367 | Light metal alloy piston | Atsuo Tanaka, Yoshiaki Kajikawa, Shiro Machida, Tadashi Dohnomoto | 1987-06-02 |
| 4659093 | Three-piece oil-ring with an inward protrusion | — | 1987-04-21 |
| 4548416 | Oil-ring including two rail rings and an expander-spacer ring which bites into the rail ring | — | 1985-10-22 |
| 4467749 | Flow control device of a helically-shaped intake port | — | 1984-08-28 |
| 4344407 | Cylinder head, ports, and piston configuration | Masami Konishi, Akio Kuramoto, Norikatsu Ishikawa, Makoto Suzuki | 1982-08-17 |
| 4199202 | Bearing structure for a cam shaft in internal combustion engines | — | 1980-04-22 |