Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9540713 | Pipe provided with corrosion prevention layer on the outside surface | Hiroaki Shimizu, Hiroaki Fujii | 2017-01-10 |
| 8828556 | Pipe provided with corrosion prevention layer on the outside surface | Hiroaki Shimizu, Hiroaki Fujii | 2014-09-09 |