P

Inventor

SUN ZHIFENG

US4 patents
⚠️ This page may combine multiple inventors who share the name “SUN ZHIFENG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

X DEV LLC

2 patents

SOFTPROBE MEDICAL SYSTEMS INC

1 patent

CHINA NAT OFFSHORE OIL CORP

1 patent