Gennady A. Tkachenko

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Novosibirsk, SU

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Patents Grantslast 30 patents

Information Patent Grant
Percussive action machine for making holes in the ground
- Patent number 4,637,476
- Issue date Jan 20, 1987
- Institut Gornogo Dela Sibirskogo Otdelenia Akademii Nauk SSSR
- Konstantin S. Gurkov
- E21 - EARTH DRILLING MINING