US PATENT SUBCLASS 128 / 206.19
.~.~.~.~ Body of mask, other than viewing means, formed of porous filter material (e.g., surgical mask formed entirely of cloth, etc.)

Current as of: June, 1999
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128 /   HD   SURGERY

200.24  DF  RESPIRATORY METHOD OR DEVICE {32}
205.27  DF  .~ Means for removing substance from respiratory gas {2}
205.29  DF  .~.~ Particulate filtering {2}
206.12  DF  .~.~.~ Face mask covering a breathing passage {7}
206.19.~.~.~.~ Body of mask, other than viewing means, formed of porous filter material (e.g., surgical mask formed entirely of cloth, etc.)

DEFINITION

Classification: 128/206.19

Body of mask, other than viewing means, formed of porous filter material (e.g., surgical mask formed entirely of cloth, etc.):

(under subclass 206.12) Subject matter wherein the body of the mask, other than a viewing means, is formed of foraminous filter material.