Patent ID: 7053753

Claim:
An electronic messaging system comprising: (a) a plurality of physical units, each comprising: (i) a microprocessor having a memory associated therewith, (ii) a plurality of light sources controlled by the microprocessor; (iii) an icon associated with each of said plurality of light sources; and (iv) a paging receiver responsive to a predetermined RF carrier frequency transmitted by a paging terminal and adapted to receive encoded messages in accordance with a predetermined protocol from said paging terminal on a non-prioritized basis, said encoded messages including an address code and whereby said physical units can be grouped either on a geographical or logical basis in that only those physical units whose paging receiver is tuned to said predetermined carrier frequency, and having an address matching said address code, can forward the data to said microprocessor for causing the microprocessor to actuate more than one of the plurality of light sources simultaneously in accordance with the received data for illuminating selective ones of said icons, thereby providing notification of multiple alert conditions at a given time.