Valentin K. Svirschevsky

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Novosibirsk, SU

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for making holes in soil
- Patent number 5,031,707
- Issue date Jul 16, 1991
- Nikolai P. Gerasimenko
- E21 - EARTH DRILLING MINING
Information Patent Grant
Machine for making underground excavations
- Patent number 4,230,191
- Issue date Oct 28, 1980
- Valentin K. Svirschevsky
- E21 - EARTH DRILLING MINING