Katharine A. Muirhead has been granted 4 US patents while listed as an inventor at Zynaxis. The first was granted in 1989 and the most recent in September 1997. Katharine A. Muirhead ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Katharine A. Muirhead in West Chester, PA, US.