US PATENT SUBCLASS 128 / 205.21
.~.~ Means broken or pierced to supply gas

Current as of: June, 1999
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128 /   HD   SURGERY

200.24  DF  RESPIRATORY METHOD OR DEVICE {32}
204.18  DF  .~ Means for supplying respiratory gas under positive pressure {17}
205.21.~.~ Means broken or pierced to supply gas

DEFINITION

Classification: 128/205.21

Means broken or pierced to supply gas:

(under subclass 204.18) Subject matter including a means which is broken or pierced to supply the breathed gas.