Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885450 | Machine for resistance butt welding of pipes | Boris E. Paton, Vladimir K. Lebedev, Sergei I. Kuchuk-Yatsenko, Alexandr K. Kharchenko, Mikhail R. Unigovsky | 1989-12-05 |
| 4803330 | Machine for flash butt welding of pipes | Sergei I. Kuchuk-Yatsenko, Boris A. Galian, Vladimir F. Zelensky | 1989-02-07 |