Inventor
MATSUZAWA KINYA
JP30 patents
⚠️ This page may combine multiple inventors who share the name “MATSUZAWA KINYA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SEIKO EPSON CORP
25 patentsUS6166470ADec 26, 2000
Brushless DC motor
SEIKO EPSON CORP38 citations92
US5952760ASep 14, 1999
Brushless DC motor
SEIKO EPSON CORP27 citations92
US5808390ASep 15, 1998
Brushless DC motor
SEIKO EPSON CORP44 citations92
US5679997AOct 21, 1997
Brushless DC motor and method for driving the same
SEIKO EPSON CORP34 citations92
US8009846B2Aug 30, 2011
Ultrasonic speaker and projector
SEIKO EPSON CORP9 citations84
US7907740B2Mar 15, 2011
Electrostatic ultrasonic transducer drive control method, electrostatic ultrasonic transducer, ultrasonic speaker using the same, audio signal reproduction method, ultra-directional acoustic system, and display device
SEIKO EPSON CORP17 citations84
US7881489B2Feb 1, 2011
Ultrasonic transducer and ultrasonic speaker using the same
SEIKO EPSON CORP13 citations84
US7769193B2Aug 3, 2010
Electrostatic ultrasonic transducer, ultrasonic speaker, audio signal reproduction method, electrode manufacturing method for use in ultrasonic transducer, ultrasonic transducer manufacturing method, superdirective acoustic system, and display device
SEIKO EPSON CORP17 citations84
US6800983B1Oct 5, 2004
Magnetic circuit structure, and power-generating device and electronic device using the same
SEIKO EPSON CORP13 citations84
US8049368B2Nov 1, 2011
Load driving circuit and load driving method
SEIKO EPSON CORP6 citations74
US7804971B2Sep 28, 2010
Electrostatic ultrasonic transducer, ultrasonic speaker and display device
SEIKO EPSON CORP7 citations74
US6879068B2Apr 12, 2005
Power generator, timepiece and electronic device having the same, and cogging torque adjustment method for the same
SEIKO EPSON CORP5 citations74
US6628037B2Sep 30, 2003
Power generator, electronic device using the same, method of setting plate thickness in a magnetic circuit in electronically controlled timepiece and power generator
SEIKO EPSON CORP8 citations74
US6541882B2Apr 1, 2003
Power generator, timepiece and electronic device having the same, and cogging torque adjustment method for the same
SEIKO EPSON CORP9 citations74
US5903074AMay 11, 1999
Brushless DC motor and method for driving the same
SEIKO EPSON CORP8 citations74
US8045735B2Oct 25, 2011
Ultrasonic transducer and ultrasonic speaker using the same
SEIKO EPSON CORP3 citations63
US7949143B2May 24, 2011
Ultrasonic transducer, ultrasonic speaker, acoustic system, and control method of ultrasonic transducer
SEIKO EPSON CORP2 citations63
US7690792B2Apr 6, 2010
Projector and method of controlling ultrasonic speaker in projector
SEIKO EPSON CORP4 citations63
US7564986B2Jul 21, 2009
Ultrasonic speaker and projector
SEIKO EPSON CORP5 citations63
US7542579B2Jun 2, 2009
Ultrasonic transducer, ultrasonic speaker, acoustic system, and control method of ultrasonic transducer
SEIKO EPSON CORP2 citations63
US7210785B2May 1, 2007
Projector
SEIKO EPSON CORP4 citations63
US7191655B2Mar 20, 2007
Material determination system and method
SEIKO EPSON CORP5 citations63
US6831446B2Dec 14, 2004
Power generator, timepiece and electronic device having the same, and cogging torque adjustment method for the same
SEIKO EPSON CORP3 citations63
US6633511B1Oct 14, 2003
Electronic controlling type mechanical timepiece
SEIKO EPSON CORP3 citations62
US7224098B2May 29, 2007
Ultrasonic transducer and method of manufacturing ultrasonic transducer
SEIKO EPSON CORP0 citations49