HK

Hirofumi Kawashima

PL Piedek Technical Laboratory: 54 patents #1 of 1Top 100%
SC Seiko Electronic Components: 7 patents #1 of 47Top 3%
DS Daini Seikosha: 4 patents #21 of 155Top 15%
SE Seiko Instruments & Electronics: 2 patents #33 of 164Top 25%
FI Fujifilm Business Innovation: 1 patents #3,579 of 5,238Top 70%
Overall (All Time): #30,172 of 4,157,543Top 1%
69
Patents All Time

Issued Patents All Time

Showing 26–50 of 69 patents

Patent #TitleCo-InventorsDate
8127427 Quartz crystal unit, quartz crystal oscillator having quartz crystal unit, and electronic apparatus having quartz crystal oscillator 2012-03-06
8122587 Manufacturing method of quartz crystal unit 2012-02-28
8096042 Method for manufacturing a quartz crystal resonator, quartz crystal unit and quartz crystal oscillator 2012-01-17
8091189 Method for manufacturing quartz crystal unit, quartz crystal oscillator and electronic apparatus 2012-01-10
7944131 Quartz crystal unit, quartz crystal oscillator and manufacturing method of the same 2011-05-17
7845063 Quartz crystal unit and method for manufacturing a quartz crystal unit and electronic apparatus 2010-12-07
RE41671 Quartz crystal tuning fork resonator 2010-09-14
7779530 Method for manufacturing a quartz crystal unit 2010-08-24
7768179 Quartz crystal unit, quartz crystal oscillator having quartz crystal unit and electronic apparatus having quartz crystal oscillator 2010-08-03
7723904 Resonator, unit having resonator, oscillator having unit and electronic apparatus having oscillator 2010-05-25
7564326 Electronic apparatus and manufacturing method of the same 2009-07-21
7536768 Method for manufacturing quartz crystal unit, quartz crystal oscillator and electronic apparatus 2009-05-26
7528682 Electronic apparatus having display portion and oscillator and manufacturing method of the same 2009-05-05
7441316 Method for manufacturing electronic apparatus 2008-10-28
7412764 Method for manufacturing quartz crystal unit and electronic apparatus having quartz crystal unit 2008-08-19
7365478 Piezoelectric crystal resonator, piezoelectric crystal unit having the crystal resonator and electronic apparatus having the crystal resonator 2008-04-29
7342352 Resonator, unit having resonator, oscillator having unit and electronic apparatus having oscillator 2008-03-11
7193354 Resonator, unit having resonator, oscillator having unit and electronic apparatus having oscillator 2007-03-20
7170218 Electronic apparatus with two quartz crystal oscillators utilizing different vibration modes 2007-01-30
7071794 Quartz crystal resonator, unit having resonator, oscillator having unit, electronic apparatus having oscillator, and method for manufacturing electronic apparatus 2006-07-04
6959472 Method for manufacturing quartz crystal oscillator 2005-11-01
6915548 Method for manufacturing quartz crystal tuning fork resonator, quartz crystal unit having quartz crystal tuning fork resonator, and quartz crystal oscillator having quartz crystal unit 2005-07-12
6911765 Quartz crystal tuning fork resonator 2005-06-28
6903618 Quartz crystal unit, and quartz crystal oscillator having quartz crystal unit 2005-06-07
6898832 Method for manufacturing a quartz crystal unit 2005-05-31