AK

Akio Koyano

SC Sumitomo Special Metals Co.: 1 patents #136 of 262Top 55%
Overall (All Time): #4,036,118 of 4,157,543Top 100%
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4454386 Piezoelectric transducer for piezoelectric loud speaker — 1984-06-12