Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4922767 | Helical gear transmission device | — | 1990-05-08 |
IT
Ito Toshifumi
Overall (All Time): #3,902,139 of 4,157,543Top 95%
1
Patents All Time