Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886558 | Method for heat-treating steel rail head | Toyokazu Teramoto, Akio Fujibayashi, Mashiro Ueda, Shinichi Nagahashi, Yazuru Kataoka +5 more | 1989-12-12 |
| 4849457 | Method of producing plastic sheet with porous surface | Masaru Ichii, Shigeru Tani | 1989-07-18 |