Inventor

DROBYAZKO VLADIMIR F

SU2 patents

Patents

2 patents

US4171727AOct 23, 1979

Reversible, percussive device for ground perforation

INST GORNOGO DELA SIBIRSKOGO O7 citations66

US4440240AApr 3, 1984

Method of making holes in the soil and apparatus for performing this method

INST GORNOGO DELA SIBIRSKOGO O0 citations41