A biohazard-isolating bag is positioned in the interior space of a public mailbox. The biohazard-isolating bag receives mail that is deposited in the mailbox. A postal worker, upon retrieving mail from the mailbox, closes the biohazard-isolating bag. Contaminants that may be carried by letters or mailpieces...http://www.google.com/patents/US20030106929?utm_source=gb-gplus-sharePatent US20030106929 - Securing and handling of mail
