Inventor
SZPEK JR FRANK R
US3 patents
Patents
3 patentsUS9702250B2Jul 11, 2017
Power shovel hoist machinery with auxiliary weight box
CATERPILLAR GLOBAL MINING LLC2 citations70
US9127435B2Sep 8, 2015
Power shovel hoist machinery with auxiliary weight box
CATERPILLAR GLOBAL MINING LLC4 citations70
US9388689B2Jul 12, 2016
Multi-deck mining vehicle
CATERPILLAR GLOBAL MINING LLC2 citations59