Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8430977 | Hollow drilling steel rod and method of manufacturing the same | Masaya Hisada, Yoneo Hiwasa, Noritaka Takahata | 2013-04-30 |
| 8147595 | Membrane material for gas holder and gas holder using the same | Hiroyuki Mori, Mikio Kusaka, Yasuo Motoishi | 2012-04-03 |