Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5160389 | Flexible tube for automotive exhaust systems | Hisao Fujikawa | 1992-11-03 |
| 4950873 | Sheath heater | Yoshiaki Shida, Hisao Fujikawa, Nobuyuki Maruyama | 1990-08-21 |
| 4742324 | Sheath heater | Yoshiaki Shida, Hisao Fujikawa, Nobuyuki Maruyama | 1988-05-03 |
| 4484956 | Process for producing heat-resistant ferritic stainless steel sheet | Yoshiaki Shida, Hisao Fujikawa, Masao Koike, Junichiro Murayama | 1984-11-27 |