Patent 7398865 was granted and assigned to Inventio on July, 2008 by the United States Patent and Trademark Office.
An elevator car operating panel for registering elevator calls has a plurality of touch sensitive buttons freely configurable to correspond to floors of a building according to a specified configuration. The buttons are configured to be lighted with light of a first color when active in the specified configuration so as to be visible, and are configured to not be lighted when inactive in the specified configuration so as to be invisible.