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Class Information
Number: 454/361
Name: Ventilation > Having outlet airway > Having readliy movable air regulating louver, damper, or cover > Internal damper
Description: Subject matter wherein the air exhausting means includes an easily shiftable air permitting or preventing inner body which is configured such that it remains completely within the confines of the air exhausting means in all of its shifted positions.
Sub-classes under this class:
Patents under this class:
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