Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4770257 | Method of preventing loss of drilling mud during boring a hole in the ground | Motoki KONDO, Hirosuke Kubota, Mamoru Shinozaki, Tomohiro Teramura, Masayasu Kitano +1 more | 1988-09-13 |