 Birkenstock played two matches for Worcestershire Second XI during the 2008 season, scoring a half century in his second of three innings for the side.Birkenstock's first-class debut came during the 2009-10 South African cricket season, for Boland against Griqualand West.Knife-edge scanning microscope

The Knife-Edge Scanning Microscope (KESM) was invented and patented in the late 1990s by Bruce McCormick at Texas A&M University.