Valentina A. Khabetskaya

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Moscow, SU

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Patents Grantslast 30 patents

Information Patent Grant
Screw machine having a plurality of symmetrically arranged rotors
- Patent number 4,764,094
- Issue date Aug 16, 1988
- Vsesojuzny Nauchno-Issledovatelsky Institut Burovoi Tekhniki
- Dmitry F. Baldenko
- E21 - EARTH DRILLING MINING