Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4721577 | Stabilized fracturing fluid and method of stabilizing fracturing fluid | Shoichi Kanda, Makoto Yanagita | 1988-01-26 |
| 4691013 | Process for production of modified hydroxyethyl cellulose | Makoto Yanagita, Shoichi Kanda | 1987-09-01 |
| 4681690 | Stabilized fracturing fluid and method of stabilizing fracturing fluid | Shoichi Kanda, Makoto Yanagita | 1987-07-21 |
| 4661266 | Completion and workover fluids | Shoichi Kanda, Makoto Yanagita | 1987-04-28 |
| 4614601 | Completion and workover fluids | Makoto Yanagida, Shoichi Kanda | 1986-09-30 |
| 4605505 | Drilling fluids | Makoto Yanagida, Shoichi Kanda | 1986-08-12 |
| 4518261 | Equipment for dissolving polyacrylamide powder for obtaining an aqueous solution thereof for enhanced oil recovery | Osamu Okamoto | 1985-05-21 |