KH

Keizou Hirai

HC Hitachi Chemical Company: 1 patents #9 of 96Top 10%
Overall (2003): #181,429 of 273,478Top 70%
1
Patents 2003

Issued Patents 2003

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6615499 Method for producing cerium oxide, cerium oxide abrasive, method for polishing substrate using the same and method for manufacturing semiconductor device Jun Matsuzawa, Atsushi Sugimoto, Masato Yoshida, Toranosuke Ashizawa, Yuuto Ootsuki 2003-09-09