KA

Kazuaki Akai

Overall (All Time): #1,310,926 of 4,157,543Top 35%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
12188193 Method for preventing repeated (tsunami, storm surge, and river) disasters by forces of nature — 2025-01-07
5228800 Purifying breakwater — 1993-07-20
4824284 Purifying system of water area — 1989-04-25