LOW-COST USER ACTIVITY MONITOR FOR PORTABLE OR MOBILE RADIOS
Original Publication Date: 2000-Jan-01
Included in the Prior Art Database: 2002-Sep-11
A portable radio with a 'deadman' feature com- prising a timer. If the radio does not detect motion by the radio's user before the timer times out, then the user is warned. If the user does not respond, then the radio instigates an emergency routine.