Assignee
BAKERDRILL INC
9 patents
Top patents by PatentIndex Score
US3970335AJul 20, 1976
Dual concentric pipes
BAKERDRILL INC44 citations94
US3948588AApr 6, 1976
Swivel for core drilling
BAKERDRILL INC62 citations94
US3941196AMar 2, 1976
Percussive air hammer and core bit apparatus
BAKERDRILL INC45 citations94
US4102418AJul 25, 1978
Borehole drilling apparatus
BAKERDRILL INC40 citations88
US3958645AMay 25, 1976
Bore hole air hammer
BAKERDRILL INC27 citations82
US4030554AJun 21, 1977
Bore hole airhammer and anvil bit
BAKERDRILL INC24 citations80
US4146097AMar 27, 1979
Bore hole air hammer
BAKERDRILL INC15 citations74
US3944003AMar 16, 1976
Bore hole air hammer
BAKERDRILL INC10 citations74
US3934662AJan 27, 1976
Core bit
BAKERDRILL INC6 citations72