US PATENT SUBCLASS 128 / 868
.~.~.~.~ Valve means (e.g., diaphragm)

Current as of: June, 1999
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128 /   HD   SURGERY

846  DF  BODY PROTECTING OR RESTRAINING DEVICES FOR PATIENTS OR INFANTS (E.G., SHIELDS, IMMOBILIZERS) {8}
857  DF  .~ Head or face protector (e.g., lips, ears, etc.) {4}
864  DF  .~.~ Aural protectors (e.g., ear) {3}
867  DF  .~.~.~ With noise or pressure attenuating means (e.g., dampening, filtering, etc.) {1}
868.~.~.~.~ Valve means (e.g., diaphragm)

DEFINITION

Classification: 128/868

Valve means (e.g., diaphragm):

(under subclass 867) Subject matter wherein the ear protecting means is a membraneous structure which prevents the entrance of noise into the ear canal.