Inventor
NAKAGAWA YASUICHI
5 patents
Patents
5 patentsUS4006374AFeb 1, 1977
Electric micro motor for a timepiece
SEIKO INSTR & ELECTRONICS8 citations68
US3979901ASep 14, 1976
Construction of the gear train for a timepiece
SEIKO INSTR & ELECTRONICS3 citations57
US4057698ANov 8, 1977
Switching mechanism of a timepiece
SEIKO INSTR & ELECTRONICS3 citations56
US4028881AJun 14, 1977
Mechanism for correcting calendar in a watch
SEIKO INSTR & ELECTRONICS1 citations47
US4125994ANov 21, 1978
Train structure of a timepiece
SEIKO INSTR & ELECTRONICS1 citations45