US PATENT SUBCLASS 128 / 200.28
.~ Body or head supported means, other than face mask or hood, with gas stream to screen face or penetrate contaminated atmosphere

Current as of: June, 1999
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128 /   HD   SURGERY

200.24  DF  RESPIRATORY METHOD OR DEVICE {32}
200.28.~ Body or head supported means, other than face mask or hood, with gas stream to screen face or penetrate contaminated atmosphere

DEFINITION

Classification: 128/200.28

Body or head supported means, other than face mask or hood, with gas stream to screen face or penetrate contaminated atmosphere:

(under subclass 200.24) Subject matter including means, other

than a face mask or hood, with a gas stream to screen the user's face or penetrate a contaminated atmosphere.

(1) Note. A "hood" as used herein is a cover for the scalp and face. See subclass 205.25 for the definition of a face mask.

SEE OR SEARCH CLASS

454, Ventilation,

88+, for protective air currents used in a ventilating system.