Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9651175 | Seamless steel pipe for line pipe | Yuji Arai, Yukimasa Ueda, Yasuyoshi Hidaka | 2017-05-16 |
| 5480763 | Method for manufacturing a stamper for high-density recording discs | Tetsuya Kondo, Yoshikazu Nagai, Katunori Ohshima | 1996-01-02 |
| 4655876 | Method for fabricating a master recording disc | Noboru Kawai, Toshiro Abe | 1987-04-07 |