Inventor
KAWANOBE KOUHEI
4 patents
Patents
4 patentsUS4257115AMar 17, 1981
Switch structure for electronic timepiece
CITIZEN WATCH CO LTD72 citations94
US4268913AMay 19, 1981
Electronic calculator watch
CITIZEN WATCH CO LTD22 citations80
US4150365AApr 17, 1979
Driver circuit for electrochromic display device
CITIZEN WATCH CO LTD6 citations62
US4060974ADec 6, 1977
Method and apparatus for driving electrochromic display device
CITIZEN WATCH CO LTD4 citations61