Inventor
CAMPBELL JOHN A L
8 patents
⚠️ This page may combine multiple inventors who share the name “CAMPBELL JOHN A L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PEABODY COAL CO
5 patentsUS4380353AApr 19, 1983
Dust control system and method of operation
PEABODY COAL CO79 citations90
US4200335AApr 29, 1980
Gauging apparatus and method, particularly for controlling mining by a mining machine
PEABODY COAL CO29 citations80
US4173373ANov 6, 1979
Advance method and apparatus for mining
PEABODY COAL CO19 citations80
US4102550AJul 25, 1978
Mining method and apparatus
PEABODY COAL CO26 citations80
US4082360AApr 4, 1978
Mining apparatus and method
PEABODY COAL CO8 citations71
KERR MCGEE COAL CORP
3 patentsUS4629392ADec 16, 1986
System for batch loading coal into railroad cars
KERR MCGEE COAL CORP46 citations85
US4904154AFeb 27, 1990
Loading system for railroad cars
KERR MCGEE COAL CORP25 citations83
US4746498AMay 24, 1988
Process for reducing gaseous sulfur dioxide content of flue gases by preheating coals prior to burning such coals and by controlling combustion temperature levels
KERR MCGEE COAL CORP2 citations55