Inventor
IWAKURA RYOJI
JP8 patents
⚠️ This page may combine multiple inventors who share the name “IWAKURA RYOJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CITIZEN WATCH CO LTD
7 patentsUS6894952B2May 17, 2005
Timer of electric timepiece
CITIZEN WATCH CO LTD10 citations73
US4370067AJan 25, 1983
Electronic timepiece with gain/loss adjustment
CITIZEN WATCH CO LTD14 citations73
US4346350AAug 24, 1982
FET Quartz oscillators
CITIZEN WATCH CO LTD18 citations72
US6727769B2Apr 27, 2004
Crystal oscillator circuit using CMOSFETs
CITIZEN WATCH CO LTD7 citations70
US4433920AFeb 28, 1984
Electronic timepiece having improved primary frequency divider response characteristics
CITIZEN WATCH CO LTD3 citations62
US6853219B2Feb 8, 2005
Charging circuit
CITIZEN WATCH CO LTD0 citations49
US4173117ANov 6, 1979
Electronic timepiece
CITIZEN WATCH CO LTD0 citations41