Combination mailer comprising postcard-weight stock having therein at least two areas, a first right hand area for an address and postage and a left hand area which includes a partially perfed (die cut) index card which may be removed from the combination mailer. The index cards may be standard small...http://www.google.de/patents/US5076490?utm_source=gb-gplus-sharePatent US5076490 - Combination index card/post card
