Patent 7401729 was granted and assigned to NCR on July, 2008 by the United States Patent and Trademark Office.
A self service terminal comprises a keyboard including a plurality of separate, individually operable keys having user engageable surfaces. Each key includes a display having an image thereon which is produced by electronic ink. The terminal further comprises a central processing unit (CPU) connected to the keyboard and arranged to control each display to control the image displayed by each respective display.