Hamilton Sundstrand, the manufacturer of the Space Shuttle EVA (extravehicular activity,"space walk") suits, designed this patch to be affixed to all of its space suits -- since company logos are not done on NASA equipment. The central human figure is an astronaut suited for EVA. (c)
The EVA Patch is worn on the left shoulder of the EVA suits used by shuttle astronauts. The astronaut depicted in the patch, is an adaptation of Leonardo da Vinci's "The Vitruvian Man" sketch. The patch was first worn by Story Musgrave and Don Peterson on STS-6.