Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4958685 | Method for plugging lost circulation areas and lost circulation material to be used therefor | Takeshi Hihara, Kazuhito Ono | 1990-09-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4958685 | Method for plugging lost circulation areas and lost circulation material to be used therefor | Takeshi Hihara, Kazuhito Ono | 1990-09-25 |