SS

Sachio Shimizu

WC W.R. Grace & Co.-Conn.: 2 patents #6 of 57Top 15%
Overall (2004): #42,501 of 270,089Top 20%
2
Patents 2004

Issued Patents 2004

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6793441 Tunnel waterproofing method Keiichi Kosuge 2004-09-21
6767164 Tunnel waterproofing construction method Keiichi Kosuge 2004-07-27