Inventor
MA ZHENGANG
CN5 patents
⚠️ This page may combine multiple inventors who share the name “MA ZHENGANG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CCTEG CHONGQING RES INSTITUTE CO LTD
4 patentsUS12509943B2Dec 30, 2025
Combined drilling system with double rotary driving devices and control method therefor
CCTEG CHONGQING RES INSTITUTE CO LTD0 citations45
US12584356B2Mar 24, 2026
Power head of directional drill
CCTEG CHONGQING RES INSTITUTE CO LTD0 citations44
US12560028B2Feb 24, 2026
Coal mine automatic directional drill
CCTEG CHONGQING RES INSTITUTE CO LTD0 citations44
US12523101B2Jan 13, 2026
Rotation angle control and braking device for power head of directional drill
CCTEG CHONGQING RES INSTITUTE CO LTD0 citations44