US PATENT SUBCLASS 381 / FOR 135
.~ Specified casing or housing (381/69)

Current as of: June, 1999
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381 /   HD   ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

FOR 127  DF  HEARING AIDS, ELECTRICAL (381/68) {15}
FOR 135.~ Specified casing or housing (381/69) {2}
FOR 136  DF  .~.~> Having vacuum tube amplifier (381/69.1)
FOR 137  DF  .~.~> Having battery (381/69.2)

DEFINITION

Classification: 381/FOR.135

Specified casing or housing:

Subject matter including a specific container for the hearing aid components.