A multipurpose mailing envelope which consists of a combination of an outer jacket of biodegradable material such as paper, cardboard or the like, and an inner jacket of soft elastic plastic padding material which stiffens the outer jacket and which is disposed loosely therein. The inside surfaces of...http://www.google.fr/patents/US5547075?utm_source=gb-gplus-shareBrevet US5547075 - Multipurpose mailing envelope
