A mailer blank, which may be configured for subsequent printing and folding processes, includes a transparent sheet and an attached opaque layer, both of which extend between longitudinal and transverse edges. An aperture is formed within the opaque layer. In a first version, the mailer blank also includes...http://www.google.com/patents/US6155476?utm_source=gb-gplus-sharePatent US6155476 - Laminated mailer blank with transparent window
