Inventor
FURUKAWA TSUNEAKI
JP7 patents
Patents
7 patentsUS6476579B1Nov 5, 2002
Pulse motor driving device, pulse motor driving method, timepiece device, and timepiece device control method
SEIKO EPSON CORP22 citations92
US7170826B2Jan 30, 2007
Multifunctional watch
SEIKO EPSON CORP22 citations91
US6567345B1May 20, 2003
Clocking device
SEIKO EPSON CORP38 citations91
US5737246AApr 7, 1998
Water depth measuring device
SEIKO EPSON CORP29 citations89
US5610468AMar 11, 1997
Ultrasonic step motor
SEIKO EPSON CORP20 citations89
US5237237AAug 17, 1993
Ultrasonic motor and drive method
SEIKO EPSON CORP26 citations89
US5343108AAug 30, 1994
Ultrasonic step motor
SEIKO EPSON CORP12 citations71