73633423
Dec 3, 1986
Jun 19, 1990
FACE SHIELDS AND HEAT/MOISTURE EXCHANGERS FOR USE WITH A FACE SHIELD TO CONDITION AIR FOR HEATING AND MOISTENING THEREOF FOR SPORTSMEN
Electrical and Scientific ApparatusHEAT/MOISTURE EXCHANGERS FOR USE WITH A FACE SHIELD TO CONDITION AIR FOR HEATING AND MOISTENING THEREOF FOR MEDICAL OPERATIONS, ASTHMATICS, AND OTHER MEDICAL PROCEDURES
Medical Apparatus