IH

Iwao Hirayama

SP Seiko Precision: 1 patents #81 of 173Top 50%
Overall (All Time): #3,703,401 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5838644 Electroluminescent display and luminous timepiece dial Koji Yoneda, Koji Hirose, Shigehiko Aoki 1998-11-17