Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885450 | Machine for resistance butt welding of pipes | Boris E. Paton, Sergei I. Kuchuk-Yatsenko, Vasily A. Sakharnov, Alexandr K. Kharchenko, Mikhail R. Unigovsky | 1989-12-05 |