Inventor
ICHIKAWA RYOICHI
JP32 patents
⚠️ This page may combine multiple inventors who share the name “ICHIKAWA RYOICHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ICHIKAWA RYOICHI
9 patentsUS8618721B2Dec 31, 2013
Method of manufacturing the piezoelectric device and the same
ICHIKAWA RYOICHI23 citations89
US8531092B2Sep 10, 2013
Surface-mountable piezoelectric devices including eutectic-bonded packages
ICHIKAWA RYOICHI8 citations83
US8154178B2Apr 10, 2012
Piezoelectric frame surrounding a piezoelectric vibrating piece and package with exhaust channel
ICHIKAWA RYOICHI7 citations83
US8093787B2Jan 10, 2012
Tuning-fork-type piezoelectric vibrating piece with root portions having tapered surfaces in the thickness direction
ICHIKAWA RYOICHI8 citations83
US8303755B2Nov 6, 2012
Manufacturing methods of piezoelectric devices
ICHIKAWA RYOICHI6 citations72
US8823247B2Sep 2, 2014
Piezoelectric vibrating devices including respective packages in which castellations include respective connecting electrodes
ICHIKAWA RYOICHI2 citations62
US8405284B2Mar 26, 2013
Impact-resistant piezoelectric devices
ICHIKAWA RYOICHI2 citations62
US8278798B2Oct 2, 2012
Crystal device
ICHIKAWA RYOICHI5 citations62
US8549717B2Oct 8, 2013
Methods for manufacturing piezoelectric devices
ICHIKAWA RYOICHI1 citations51
NIHON DEMPA KOGYO CO
8 patentsUS8347719B2Jan 8, 2013
Piezoelectric frame and piezoelectric device incorporating same
NIHON DEMPA KOGYO CO10 citations84
US8018126B2Sep 13, 2011
Piezoelectric devices exhibiting reduced CI degradation
NIHON DEMPA KOGYO CO11 citations83
US7902729B2Mar 8, 2011
Piezoelectric vibrating pieces and piezoelectric devices
NIHON DEMPA KOGYO CO7 citations83
US7888850B2Feb 15, 2011
Tuning-fork type piezoelectric unit
NIHON DEMPA KOGYO CO2 citations63
US7859173B2Dec 28, 2010
Tuning fork type quartz crystal resonator
NIHON DEMPA KOGYO CO4 citations63
US8610338B2Dec 17, 2013
Tuning-fork type piezoelectric vibrating piece with enhanced frequency adjustment and piezoelectric device incorporating same
NIHON DEMPA KOGYO CO2 citations62
US8382995B2Feb 26, 2013
Piezoelectric devices and methods for manufacturing same
NIHON DEMPA KOGYO CO2 citations62
US7544464B2Jun 9, 2009
Manufacturing method of tuning-fork type quartz crystal resonator
NIHON DEMPA KOGYO CO0 citations52
HITACHI LTD
4 patentsUS5757573AMay 26, 1998
Magnetic disk device without slider and having magnetic head mounted directly on magnetic head support
HITACHI LTD29 citations92
US5335126AAug 2, 1994
Magnetic disk device without slider and having magnetic head mounted directly on magnetic head support including integral gas pressure generating structure
HITACHI LTD19 citations78
US6912102B2Jun 28, 2005
Magnetic head with IC thereon with recording frequency controlled according to IC position
HITACHI LTD2 citations63
US6754023B2Jun 22, 2004
Magnetic disk device with magnetic head supporting mechanism having integrated circuit mounted thereon
HITACHI LTD2 citations63
KOYAMA MITSUAKI
3 patentsUS8890391B2Nov 18, 2014
External force detection apparatus and external force detection sensor
KOYAMA MITSUAKI5 citations72
US8966980B2Mar 3, 2015
External force detecting device and external force detecting sensor
KOYAMA MITSUAKI2 citations62
US8919201B2Dec 30, 2014
Acceleration measuring apparatus
KOYAMA MITSUAKI2 citations61