Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4566916 | Low-hydrogen, low-nitrogen, low-oxygen welding flux | Hiroshi Naganuma, Koichi Shinada, Motonori Tamura, Shigenobu Soneda | 1986-01-28 |
| 4355054 | Process for production of a low hydrogen type covered arc-electrode | Toshihiko Takami, Kunio Koyama | 1982-10-19 |
| 4221611 | Non-fused flux composition for submerged-arc welding | Toshihiko Takami, Kunio Koyama | 1980-09-09 |