Inventor
SHIRASU HIROTOSHI
15 patents
⚠️ This page may combine multiple inventors who share the name “SHIRASU HIROTOSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
13 patentsUS4841521AJun 20, 1989
Method and system for bidirectionally transmitting data
HITACHI LTD25 citations92
US4543652ASep 24, 1985
Time-division switching unit
HITACHI LTD31 citations92
US4633460ADec 30, 1986
Time division switching system
HITACHI LTD21 citations82
US4261051AApr 7, 1981
Time-division-multiplexed exchanger
HITACHI LTD8 citations73
US4231022AOct 28, 1980
Interpolative PCM decoder utilized for μ-law and A-law
HITACHI LTD7 citations73
US4901274AFeb 13, 1990
Method and system for data driven information processing
HITACHI LTD11 citations72
US4603417AJul 29, 1986
PCM coder and decoder
HITACHI LTD4 citations62
US4276447AJun 30, 1981
Signal processing apparatus for subscriber circuits
HITACHI LTD3 citations62
US5185873AFeb 9, 1993
Control system with flag indicating two or less data inputs and counter indicating two or more controlling data driven execution method
HITACHI LTD3 citations61
US4663759AMay 5, 1987
Ring back tone transmission system
HITACHI LTD3 citations61
US4035586AJul 12, 1977
Current supply system for terminal devices
HITACHI LTD3 citations56
US4039758AAug 2, 1977
Line identifying system of common control type automatic exchange
HITACHI LTD1 citations44
US3967071AJun 29, 1976
Switching system of stored program control type
HITACHI LTD0 citations33