A messaging device (100) has a keyboard, keypad or other input device (150) that receives entry of a message. A processor (110), upon receipt of a command from the keyboard (150) instructs the messaging device (100) to append a signature (which might be or have a graphical content) to the message, executes...http://www.google.com.au/patents/US6948130?utm_source=gb-gplus-sharePatent US6948130 - Appending signature to size limited message
