P

Inventor

BARCZAK VIRGIL J

US6 patents
⚠️ This page may combine multiple inventors who share the name “BARCZAK VIRGIL J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

KERR MCGEE COAL CORP

3 patents

KERR MC GEE CHEM CORP

2 patents

BARCZAK VIRGIL J

1 patent