US PATENT SUBCLASS 128 / 201.21
.~ Using liquified oxygen

Current as of: June, 1999
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128 /   HD   SURGERY

200.24  DF  RESPIRATORY METHOD OR DEVICE {32}
201.21.~ Using liquified oxygen

DEFINITION

Classification: 128/201.21

Using liquified oxygen:

(under subclass 200.24) Subject matter using liquified oxygen, usually as a source of gas for breathing.

SEE OR SEARCH CLASS

62, Refrigeration, for devices for manufacturing and handling liquified gas.