Inventor
SHIDA MASAHARU
27 patents
⚠️ This page may combine multiple inventors who share the name “SHIDA MASAHARU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SEIKO INSTR & ELECTRONICS
26 patentsUS4326278AApr 20, 1982
Electronic timepiece
SEIKO INSTR & ELECTRONICS41 citations91
US4382691AMay 10, 1983
Electronic watch
SEIKO INSTR & ELECTRONICS22 citations82
US4321521AMar 23, 1982
Detection device of electronic timepiece
SEIKO INSTR & ELECTRONICS21 citations82
US4321520AMar 23, 1982
Electronic timepiece
SEIKO INSTR & ELECTRONICS18 citations82
US4312059AJan 19, 1982
Electronic timepiece
SEIKO INSTR & ELECTRONICS23 citations82
US4493559AJan 15, 1985
Analogue alarm electronic timepiece
SEIKO INSTR & ELECTRONICS7 citations74
US4433401AFeb 21, 1984
Electronic timepiece having a stepping motor and driving circuit compensated for power source variations
SEIKO INSTR & ELECTRONICS12 citations74
US4312058AJan 19, 1982
Electronic watch
SEIKO INSTR & ELECTRONICS8 citations74
US4276626AJun 30, 1981
Electronic watch
SEIKO INSTR & ELECTRONICS8 citations74
US4272837AJun 9, 1981
Electronic timepiece with rotation detector
SEIKO INSTR & ELECTRONICS16 citations74
US4271496AJun 2, 1981
Electronic watch
SEIKO INSTR & ELECTRONICS7 citations74
US4217751AAug 19, 1980
Electronic timepiece
SEIKO INSTR & ELECTRONICS8 citations74
US4209971AJul 1, 1980
Electronic timepiece
SEIKO INSTR & ELECTRONICS8 citations74
US4204397AMay 27, 1980
Electronic timepiece
SEIKO INSTR & ELECTRONICS12 citations74
US4358840ANov 9, 1982
Analogue alarm electronic timepiece
SEIKO INSTR & ELECTRONICS12 citations73
US4352172ASep 28, 1982
Detection device of electronic timepiece
SEIKO INSTR & ELECTRONICS10 citations73
US4321519AMar 23, 1982
Magnetic field detection device for electronic timepiece
SEIKO INSTR & ELECTRONICS11 citations73
US4241433ADec 23, 1980
Electronic watch
SEIKO INSTR & ELECTRONICS12 citations71
US4479723AOct 30, 1984
Analog electronic timepiece drive circuitry for energizing stepping motor drive coil in full and intermediate excitation states, and method therefor
SEIKO INSTR & ELECTRONICS6 citations63
US4368990AJan 18, 1983
Electronic timepiece
SEIKO INSTR & ELECTRONICS5 citations63
US4315329AFeb 9, 1982
Load measuring device for the gear train of a timepiece
SEIKO INSTR & ELECTRONICS3 citations63
US4241434ADec 23, 1980
Stepping motor mechanism for an electronic watch
SEIKO INSTR & ELECTRONICS5 citations63
US4205262AMay 27, 1980
Electronic watch
SEIKO INSTR & ELECTRONICS5 citations63
US4437769AMar 20, 1984
Electronic timepiece
SEIKO INSTR & ELECTRONICS4 citations62
US4445784AMay 1, 1984
Electronic timepiece
SEIKO INSTR & ELECTRONICS4 citations61
US4274150AJun 16, 1981
Electronic watch
SEIKO INSTR & ELECTRONICS6 citations60