Inventor
LIU CHAO KAI
8 patents
⚠️ This page may combine multiple inventors who share the name “LIU CHAO KAI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BELL TELEPHONE LABOR INC
6 patentsUS4190747AFeb 26, 1980
Signal corrected optocoupled device
BELL TELEPHONE LABOR INC23 citations80
US4004103AJan 18, 1977
Path-finding scheme for a multistage switching network
BELL TELEPHONE LABOR INC20 citations79
US4228323AOct 14, 1980
Variable loop length compensated barrier circuit
BELL TELEPHONE LABOR INC16 citations72
US4045615AAug 30, 1977
Monobus interface circuit using opto-coupled hybrids
BELL TELEPHONE LABOR INC13 citations70
US3991280ANov 9, 1976
Monobus variable resistance transmission circuit
BELL TELEPHONE LABOR INC10 citations66
US4132870AJan 2, 1979
Key telephone system optically coupled protective coupler
BELL TELEPHONE LABOR INC4 citations60