Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6494073 | Method and apparatus for production of hollowed rack bars | Kazutomi Oka | 2002-12-17 |
| 6328829 | Constrained hardening method and apparatus for deformed bar workpieces | Junichi Kato, Yoshiki Seto, Yugo Yao | 2001-12-11 |
| 5626693 | Method and apparatus for quenching a tubular workpiece | Yugo Yao, Yoshiki Seto, Junichi Kato | 1997-05-06 |
| 4776195 | Apparatus for manufacturing core wire for optical fibers | Masayoshi Kurashige, Yugo Yao, Tokio Sekigawa | 1988-10-11 |
| 4538042 | Method and apparatus for forming reinforcing cage for prestressed concrete pile | Masaho Tanaka, Tomio Shishido, Yugo Yao, Kunihilo Kobayashi, Yoshio Inoue | 1985-08-27 |
| 4290841 | Apparatus for continuously forming a coating layer on unbonded PC steel bars | — | 1981-09-22 |
| 4243447 | Method for continuously forming a coating layer on unbonded PC steel bars | — | 1981-01-06 |