Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7354549 | Cast iron member manufacturing method | Takao Watanabe, Toshiaki Onuma, Takeshi Sasaki | 2008-04-08 |
| 6069098 | Mortar substrate sheet | Yutaka Shimizu, Eiji Koutani, Morihisa Otsuka | 2000-05-30 |
| 5074085 | Panel for use in double floors | — | 1991-12-24 |