Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5662175 | Sea water pile hammer | Don C. Warrington, Vladimir A. Nifontov, Dmitri A. Trifonov-Yakovlev | 1997-09-02 |
| 4979489 | Method and apparatus for breaking reinforced concrete piles and for exposing reinforcing bars | Pulat A. Abbasov, Valentin E. Abramov, Dmitry A. Trifonov-Yakovlev, Gennady S. Kuritsyn, Alexandr P. Borodachev +5 more | 1990-12-25 |