HK

Hirofumi Kawashima

PL Piedek Technical Laboratory: 3 patents #1 of 1Top 100%
Overall (2004): #28,312 of 270,089Top 15%
3
Patents 2004

Issued Patents 2004

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6791243 Quartz crystal unit and its manufacturing method — 2004-09-14
6717336 Width-extensional mode piezoelectric crystal resonator — 2004-04-06
6707234 Quartz crystal unit, its manufacturing method and quartz crystal oscillator — 2004-03-16