Yuhpyng L. Chen has been granted 49 US patents while listed as an inventor at Pfizer. The first was granted in 1988 and the most recent in August 2010. Yuhpyng L. Chen ranks #55,592 of 4,157,543 US inventors in our database (top 1.3%). Patent records list Yuhpyng L. Chen in Waterford, CT, US.