Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6719074 | Insert chip of oil-drilling tricone bit, manufacturing method thereof and oil-drilling tricone bit | Nobuyuki Mori, Hideki Moriguchi | 2004-04-13 |
KT
Keiichi Tsuda
Japan National Oil: 1 patents #1 of 3Top 35%
Overall (2004): #176,105 of 270,089Top 70%
1
Patents 2004