A method of writing an electrically writable tag using a hand-held writing device includes the steps of providing an electrically writable tag having a plurality of electrical conductors located on a display surface of the tag, and a mechanical alignment feature including a detent for locating the tag...http://www.google.de/patents/US6908033?utm_source=gb-gplus-sharePatent US6908033 - Hand-held programmer for programmable liquid crystal display
