Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831228 | Electrical resistance welding guns having workpiece clamping and independent electrode biasing | — | 1989-05-16 |
BS
Berthold W. Schumacher
Overall (1989): #129,273 of 140,708Top 95%
1
Patents 1989