Sergei M. Grigoriev

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Moscow, SU

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Patents Grantslast 30 patents

Information Patent Grant
Method for trenchless laying of pipes and an arrangement for carryi...
- Patent number 5,039,253
- Issue date Aug 13, 1991
- Leonid I. Kantovich
- E21 - EARTH DRILLING MINING
Information Patent Grant
Hydraulic jack
- Patent number 4,770,085
- Issue date Sep 13, 1988
- Spetsialnoe Konstruktorskotekhnologicheskoe Bjuro Glavmosinzhstroja Pri Mosgo...
- Sergei M. Grigoriev
- E21 - EARTH DRILLING MINING