HK

Hirofumi Kawashima

SC Seiko Electronic Components: 2 patents #1 of 6Top 20%
Overall (1994): #32,005 of 165,921Top 20%
2
Patents 1994

Issued Patents 1994

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5334900 Torsional quartz crystal resonator 1994-08-02
5311096 KT cut width-extensional mode quartz crystal resonator 1994-05-10