Inventor
PHELPS WELDON L
US12 patents
⚠️ This page may combine multiple inventors who share the name “PHELPS WELDON L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CATERPILLAR INC
6 patentsUS4661766AApr 28, 1987
Dual current sensing driver circuit
CATERPILLAR INC59 citations96
US5189940AMar 2, 1993
Method and apparatus for controlling an implement
CATERPILLAR INC46 citations95
US4702358AOct 27, 1987
Clutch brake steering control
CATERPILLAR INC78 citations95
US5187709AFeb 16, 1993
Fault tolerant serial communications network
CATERPILLAR INC31 citations92
US4745552AMay 17, 1988
Anti-spin control apparatus and method
CATERPILLAR INC12 citations73
US4930366AJun 5, 1990
Electrical transmission control mechanism
CATERPILLAR INC12 citations68
CATERPILLAR TRACTOR CO
5 patentsUS4361871ANov 30, 1982
Failsafe wheel slip control system and method of operating same
CATERPILLAR TRACTOR CO78 citations96
US4344139AAug 10, 1982
Method and apparatus for controlling differentially driven wheel slip
CATERPILLAR TRACTOR CO90 citations95
US4521856AJun 4, 1985
Multiple threshold wheel slip control apparatus and method
CATERPILLAR TRACTOR CO46 citations92
US4373697AFeb 15, 1983
Pulse width modulated constant current servo driver
CATERPILLAR TRACTOR CO33 citations92
US4178518ADec 11, 1979
Electronic directional control circuit
CATERPILLAR TRACTOR CO2 citations62