Inventor

SZPEK JR FRANK RICHARD

US3 patents

Patents

3 patents

US8966792B2Mar 3, 2015

Machine having dipper actuator system

CATERPILLAR INC4 citations66

US8959805B2Feb 24, 2015

Machine having dipper actuator system

CATERPILLAR INC6 citations66

US8935865B2Jan 20, 2015

Power shovel having isolated hydraulic dipper actuator

CATERPILLAR INC1 citations45