Inventor
MUKAEMACHI TAKUJI
9 patents
⚠️ This page may combine multiple inventors who share the name “MUKAEMACHI TAKUJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
8 patentsUS4455645AJun 19, 1984
Back-up control system implemented with a redundancy scheme for protection against failure
HITACHI LTD52 citations89
US4024352AMay 17, 1977
Cross-point switch matrix and multiswitching network using the same
HITACHI LTD14 citations72
US4076971AFeb 28, 1978
Subscriber line testing system
HITACHI LTD10 citations71
US4145577AMar 20, 1979
Ringing control apparatus
HITACHI LTD10 citations69
US4068215AJan 10, 1978
Cross-point switch matrix and multistage switching network using the same
HITACHI LTD12 citations65
US4663759AMay 5, 1987
Ring back tone transmission system
HITACHI LTD3 citations61
US4113988ASep 12, 1978
Speech path packaging unit including controller containing shift register
HITACHI LTD3 citations55
US4075431AFeb 21, 1978
Speech path system
HITACHI LTD1 citations48