http://www.theregister.co.uk/2005/06/22 ... ll_patent/
By John Leyden
Published Wednesday 22nd June 2005 12:26 GMT
"Samsung has patented a method to allow users the recall an SMS message. The approach offers an opportunity to delete embarrassing texts providing recipients haven't already read a message, so chastened texters would need to act quickly.
The technology involves development of a phone that can send a "delete request" message to the receiver's mobile phone, requesting deletion of a potentially embarrassing SMS.
Hopefully this will work better than email message recall which often only serves to highlight that someone regrets sending a message."