Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832853 | Apparatus for improving characteristics of sand | Hisashi Shiraki, Kiyonori Takeda, Takeshi Harada | 1989-05-23 |
| 4717478 | Apparatus for improving characteristics of sand | Hisashi Shiraki, Kiyonori Takeda, Takeshi Harada | 1988-01-05 |