YH

Yoji HIRAI

Overall (All Time): #1,639,082 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5755952 Method of activating a material to be activated for adsorbent 1998-05-26
5287383 Method and apparatus for producing active carbon using carbon-containing material 1994-02-15
5190901 Method for producing active carbon using carbon-containing material 1993-03-02