P

Inventor

O'CALLAGHAN JOHN S

US8 patents
⚠️ This page may combine multiple inventors who share the name “O'CALLAGHAN JOHN S”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

BELL & HOWELL POSTAL SYSTEMS

5 patents

BOWE BELL & HOWELL CO

1 patent

BELL & HOWELL CO

1 patent

BELL & HOWELL DOCUMENT MANAGEM

1 patent