Ching Hao Hsu has been granted 4 US patents while listed as an inventor at Promise Technology. The first was granted in 1998 and the most recent in June 2005. Ching Hao Hsu ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Ching Hao Hsu in Hsinchu, TW.