A wall-hung or shelf situated free-standing voice memorandum system allows an individual to record a message for another member of the household. the system can be used in connection with a household doorbell system so that at the user's choice, the system either operates simply as a doorbell or when...http://www.google.com.au/patents/US6438221?utm_source=gb-gplus-sharePatent US6438221 - Electronote wall mounted messaging device
