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Yuji Yamashina

Sumitomo Electric Industries: 3 patents #7,735 of 21,551Top 40%
Overall (All Time): #1,647,645 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5563954 Microphone apparatus Kiminori Ono, Satoru Ibaraki 1996-10-08
5526430 Pressure gradient type microphone apparatus with acoustic terminals provided by acoustic passages Kiminori Ono, Satoru Ibaraki 1996-06-11
5226087 Microphone apparatus Kiminori Ono, Michio Matsumoto, Hiroyuki Naono, Hiroshi Kobayashi 1993-07-06