In a binder such as a window binder having two opaque thermoplastic sheets sandwiching therebetween front and rear panels and a spine panel and an outer clear thermoplastic panel forming a window over at least the spine, the outer surface of the spine panel has a depression formed in it such that the...http://www.google.com/patents/US6761498?utm_source=gb-gplus-sharePatent US6761498 - Binder construction for easy insertion and removal of spine label
