Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
April 17, 2012
Patent Application Number
10840145
Date Filed
May 6, 2004
Patent Citations Received
Patent Primary Examiner
Patent abstract
An improved vision panel provides a nail in retention method for holding half the panel in place during installation using inwardly extending retention arms that also provide threaded fasteners for attaching the halves of the frame together about the door, support for the glass pane, and when used with special fasteners having partially non-threaded shanks, a compression limiting spring biasing of the frame elements together.
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