Inventor

WITTMAN JOHN P

US2 patents

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

NORTHERN TELECOM LTD

1 patent

US4595802AJun 17, 1986

Hybrid circuit

NORTHERN TELECOM LTD15 citations65

TELE RESOURCES INC

1 patent

US4140880AFeb 20, 1979

Hold tone scanner

TELE RESOURCES INC3 citations57