Hirohisa Kato has been granted 3 US patents while listed as an inventor at Shionogi & Co.. The first was granted in 1998 and the most recent in June 2009. Hirohisa Kato ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Hirohisa Kato in Choshi, JP.