Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6347838 | Method for replacing cutters of tunnel-excavating machine, method for excavating tunnel, and tunnel excavating machine | Masahiko Sugiyama | 2002-02-19 |
TM
Tsunematsu Mukaidani
Tobishima: 1 patents #11 of 31Top 40%
Overall (All Time): #3,536,118 of 4,157,543Top 90%
1
Patents All Time