Is a
Patent attributes
Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
June 3, 2014
Patent Application Number
13826591
Date Filed
March 14, 2013
Patent Citations Received
Patent Primary Examiner
Patent abstract
A firestopping apparatus including a sleeve with at least first and second airflow-blocking elements, with at least the first airflow-blocking element comprising a resiliently compressible body and being slidably movable generally along a long axis of the sleeve.
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