P

Inventor

CHANG DAVID S

US10 patents
⚠️ This page may combine multiple inventors who share the name “CHANG DAVID S”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CHANG DAVID S

4 patents

ACCESS BUSINESS GROUP INT LLC

3 patents

FRIEDKIN CORP

1 patent

SHELL OIL CO

1 patent

STANDARD OIL CO INDIANA

1 patent