Inventor

TANAKA JOUJI

JP3 patents

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

NITSUKO LTD

2 patents

US4734936AMar 29, 1988

Ringing signal sending-out circuit

NITSUKO LTD5 citations59

US4641337AFeb 3, 1987

Key telephone system with means for operatively connecting another key telephone systems

NITSUKO LTD2 citations55

KOKUSAI ELECTRIC CO LTD

1 patent

US4151472AApr 24, 1979

Selective calling circuit employing controlled power supply therefor

KOKUSAI ELECTRIC CO LTD9 citations68