4584996 Apparatus for conservative supplemental oxygen therapy 1986-04-29 Blum 128/207.18 4253454 Respirator package for carrying on a person 1981-03-03 Warncke 4181993 Flotation garment 1980-01-08 McDaniel 4090509 Vital emergency survival time (vest) 1978-05-23 Smith 4060079 Heart-lung resuscit...