Inventor
MACHIDA TAKAYASU
JP19 patents
⚠️ This page may combine multiple inventors who share the name “MACHIDA TAKAYASU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CITIZEN WATCH CO LTD
18 patentsUS6548922B1Apr 15, 2003
2-Pole stepper motor for timepiece
CITIZEN WATCH CO LTD23 citations92
US4361410ANov 30, 1982
Drive system for pulse motor
CITIZEN WATCH CO LTD32 citations92
US4150536AApr 24, 1979
Electronic timepiece
CITIZEN WATCH CO LTD36 citations92
US4144467AMar 13, 1979
Pulse motor
CITIZEN WATCH CO LTD38 citations92
US4066947AJan 3, 1978
Stepping motor for electronic timepiece
CITIZEN WATCH CO LTD31 citations92
US4048548ASep 13, 1977
Stepping motor
CITIZEN WATCH CO LTD32 citations92
US4223522ASep 23, 1980
Electronic timepiece
CITIZEN WATCH CO LTD17 citations82
US4158287AJun 19, 1979
Driver circuit for electro-mechanical transducer
CITIZEN WATCH CO LTD24 citations82
US4129981ADec 19, 1978
Electronic timepiece
CITIZEN WATCH CO LTD17 citations82
US6774513B2Aug 10, 2004
Two-pole step motor for timepiece
CITIZEN WATCH CO LTD6 citations74
US6519853B1Feb 18, 2003
Method of manufacturing hand for analog electronic timepiece
CITIZEN WATCH CO LTD12 citations74
US4283783AAug 11, 1981
Drive control system for stepping motor
CITIZEN WATCH CO LTD13 citations73
US3958167AMay 18, 1976
Pulse motor
CITIZEN WATCH CO LTD9 citations73
US4590529AMay 20, 1986
Carriage device for moving and positioning magnetic head
CITIZEN WATCH CO LTD11 citations71
US4558244ADec 10, 1985
Micro stepping motor
CITIZEN WATCH CO LTD8 citations71
US4750063AJun 7, 1988
Floppy disk drive having a pivotally supporting cartridge carrier
CITIZEN WATCH CO LTD17 citations70
US6434086B1Aug 13, 2002
Analog electronic timepiece
CITIZEN WATCH CO LTD1 citations52
US4199699AApr 22, 1980
Motor and drive for a timepiece
CITIZEN WATCH CO LTD1 citations52