A multi-part mailing assembly includes a single-layer form of detachable parts related to each other. The assembly is combined with an envelope that both exposes and secures the parts and other contents for specialized mail handling. Spaced horizontal and vertical tear lines separate the form into multiple...http://www.google.com.au/patents/US5507526?utm_source=gb-gplus-sharePatent US5507526 - Single layer multi-part mailer assembly
