US PATENT SUBCLASS 128 / 206.28
.~.~ Covering nose and mouth

Current as of: June, 1999
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128 /   HD   SURGERY

200.24  DF  RESPIRATORY METHOD OR DEVICE {32}
206.21  DF  .~ Face mask covering a breathing passage {6}
206.28.~.~ Covering nose and mouth {3}
206.29  DF  .~.~.~> Including means inserted in mouth
207.11  DF  .~.~.~> Structure of means securing mask to head
207.12  DF  .~.~.~> Valve for controlling gas flow

DEFINITION

Classification: 128/206.28

Covering nose and mouth:

(under subclass 206.21) Subject matter wherein the mask overlies the nose and mouth.