Peter Tsai is a Taiwanese American materials scientist and inventor who is best known for inventing and patenting the N95 mask. He is an expert in the field of nonwoven fabric. In 1992 while at the University of Tennessee, Tsai led a team attempting to develop electrostatic filtration technology. Their research was successful and led to the creation of the N95 face mask. It was first adapted for industrial use with its utility in medical applications being discovered only later. Tsai continued to do work into mask technology and in 2018 he developed a new technique which doubled the filtration capacity of medical masks. This article uses material from the Wikipedia article, which is released under the Creative Commons Attribution-Share-Alike License 3.0.