Inventor
MORRELL ROGER J
13 patents
⚠️ This page may combine multiple inventors who share the name “MORRELL ROGER J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
US INTERIOR
11 patentsUS5078219AJan 7, 1992
Concave drag bit cutter device and method
US INTERIOR71 citations96
US4222611ASep 16, 1980
In-situ leach mining method using branched single well for input and output
US INTERIOR86 citations95
US5003144AMar 26, 1991
Microwave assisted hard rock cutting
US INTERIOR97 citations92
US4249777AFeb 10, 1981
Method of in situ mining
US INTERIOR49 citations92
US4072015AFeb 7, 1978
Borehole aerostatic ground support system
US INTERIOR47 citations91
US4074778AFeb 21, 1978
Square hole drill
US INTERIOR47 citations87
US3971226AJul 27, 1976
Prestressed roof support system
US INTERIOR16 citations73
US5013093AMay 7, 1991
Universal ripper miner
US INTERIOR5 citations62
US4501448AFeb 26, 1985
Universal ripper miner
US INTERIOR4 citations62
US5123710AJun 23, 1992
Impact assisted segmented cutterhead
US INTERIOR4 citations61
US3958650AMay 25, 1976
Drilling system using weight of mud
US INTERIOR1 citations51