Assignee
ENG ENTERPR
US13 patents
Top patents by PatentIndex Score
US4886432ADec 12, 1989
Bladder pump assembly
ENG ENTERPR134 citations95
US4160551AJul 10, 1979
Seal assembly
ENG ENTERPR35 citations91
US3997009ADec 14, 1976
Well drilling apparatus
ENG ENTERPR55 citations91
US3971450AJul 27, 1976
Well drilling tool
ENG ENTERPR45 citations91
US4256189AMar 17, 1981
Well drilling tool
ENG ENTERPR22 citations81
US4019591AApr 26, 1977
Well drilling tool
ENG ENTERPR29 citations81
US4019592AApr 26, 1977
By-pass tool
ENG ENTERPR29 citations81
US4466777AAug 21, 1984
Pump control circuit
ENG ENTERPR26 citations80
US4308927AJan 5, 1982
Well drilling tool
ENG ENTERPR10 citations72
US4284149AAug 18, 1981
Well drilling tool
ENG ENTERPR11 citations72
US4260032AApr 7, 1981
Well drilling tool
ENG ENTERPR15 citations72
US4260167AApr 7, 1981
Well drilling tool
ENG ENTERPR14 citations72
US4260030AApr 7, 1981
Well tool
ENG ENTERPR11 citations72