Vladimir F. Drobyazko

Follow

Person

Odessa, SU

People

Patents Grantslast 30 patents

Information Patent Grant
Method of making holes in the soil and apparatus for performing thi...
- Patent number 4,440,240
- Issue date Apr 3, 1984
- Institut Gornogo Dela Sibirskogo Otdelenia Akademii Nauk SSSR
- Alexandr D. Kostylev
- E21 - EARTH DRILLING MINING
Information Patent Grant
Reversible, percussive device for ground perforation
- Patent number 4,171,727
- Issue date Oct 23, 1979
- Institut Gornogo Dela Sibirskogo Otdelenia Akademii Nauk S S S R
- Khaim B. Tkach
- E21 - EARTH DRILLING MINING