Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4371290 | Shuttering for establishing concrete lining of tunnels | Valentin A. Ivanov, Mikhail Y. Shenkman, Vladimir L. Kirbatov, Iosif D. Y. Fishman | 1983-02-01 |
| 4315701 | Shuttering for erecting a concrete tunnel lining | Valentin A. Ivanov, Igor S. Ostrovsky, Mikhall Y. Shenkman, Jury A. Koshelev, Sergei N. Vlasov +2 more | 1982-02-16 |
| 4222681 | Shield for constructing tunnels with in-situ formed concrete lining | Valentin A. Ivanov, Anatoly S. Lugovtsov, Vladimir A. Alikhashkin, Arkady I. Mozhaev, Sergei N. Vlasov +3 more | 1980-09-16 |