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 1–25 of 69 patents

Patent #TitleCo-InventorsDate
11563406 Quartz crystal resonator, quartz crystal unit, and quartz crystal oscillator 2023-01-24
11005420 Quartz crystal unit, quartz crystal oscillator and electronic apparatus 2021-05-11
10594259 Resonator, unit and oscillator 2020-03-17
10284143 Quartz crystal unit, quartz crystal oscillator and electronic apparatus 2019-05-07
10199556 Unit, oscillator and electronic apparatus 2019-02-05
9553560 Quartz crystal unit, quartz crystal oscillator and electronic apparatus 2017-01-24
9431957 Unit, oscillator and electronic apparatus 2016-08-30
RE45829 Method for manufacturing a quartz crystal unit 2015-12-29
9209381 Quartz crystal unit, quartz crystal oscillator and electronic apparatus 2015-12-08
9203135 Method for manufacturing quartz crystal resonator 2015-12-01
9077308 Method for manufacturing a quartz crystal unit, quartz crystal oscillator and electronic apparatus 2015-07-07
RE45582 Method for manufacturing a quartz crystal unit 2015-06-23
8866567 Quartz crystal unit, quartz crystal oscillator and electronic apparatus 2014-10-21
8806738 Method for manufacturing quartz crystal unit, quartz crystal oscillator and electronic apparatus 2014-08-19
8766516 Unit, oscillator and electronic apparatus 2014-07-01
8749124 Quartz crystal unit, quartz crystal oscillator and electronic apparatus 2014-06-10
8614537 Quartz crystal unit, quartz crystal oscillator and electronic apparatus 2013-12-24
8572824 Method for manufacturing quartz crystal unit and quartz crystal oscillator having the quartz crystal unit 2013-11-05
RE44423 Method of manufacturing a quartz crystal unit 2013-08-13
8375559 Manufacturing method of a quartz crystal unit , a quartz crystal oscillator and an electronic apparatus 2013-02-19
8358053 Unit, oscillator having unit and electronic apparatus having oscillator 2013-01-22
8358052 Unit having resonator, oscillator having unit and electronic apparatus having unit 2013-01-22
8240023 Method for manufacturing a quartz crystal unit 2012-08-14
8217736 Quartz crystal unit, and manufacturing method of the same and manufacturing method of quartz crystal oscillator having quartz crystal unit 2012-07-10
8127426 Electronic apparatus having quartz crystal oscillating circuits 2012-03-06