P

Inventor

RAVENSBERGEN JOHN E

CA8 patents
⚠️ This page may combine multiple inventors who share the name “RAVENSBERGEN JOHN E”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

BJ SERVICES CO

3 patents

RAVENSBERGEN JOHN E

3 patents

(unassigned)

1 patent

BJ SERVICES CO USA

1 patent