P

Inventor

O'BRIEN JOSEPH P

US13 patents
⚠️ This page may combine multiple inventors who share the name “O'BRIEN JOSEPH P”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

COOPER EDWIN INC

9 patents

ETHYL CORP

2 patents

COOPER & CO LTD EDWIN

1 patent

ETHYL PETROLEUM ADDITIVES INC

1 patent