Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4844755 | High-strength heat-resisting ferritic steel pipe and tube | Yasuo Otoguro, Toshio Fujita | 1989-07-04 |
| 4463061 | Boiler tube having improved high temperature mechanical strength, improved high temperature corrosion resistant property and resistance to embrittlement during service | Yasuo Otoguro, Mikio Yamanaka, Mizuo Sakakibara, Masao Onoyama | 1984-07-31 |
| 4405369 | Ferritic heat-resisting steel with an excellent toughness | Yasuo Otoguro, Hisashi Takahashi, Toshio Fujita | 1983-09-20 |