Nikolai Nikolaevich Koptyazhin

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Moscow, SU

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Patents Grantslast 30 patents

Information Patent Grant
Arrangement for transporting solid materials from the bottom of basins
- Patent number 4,155,491
- Issue date May 22, 1979
- Stanislav J. Istoshin
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Device for taking bottom soil samples from deep water basins
- Patent number 4,116,069
- Issue date Sep 26, 1978
- Georgy Mikhailovich Lezgintsev
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING