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Gorouemon Otsuka

Overall (All Time): #1,692,091 of 4,157,543Top 45%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
12326358 Sound leakage suppression apparatus 2025-06-10
12209408 Sound-proof structure for building 2025-01-28