electronic device called a reader/writer, namely, an electronic device comprised of a transmitter and receiver, for remote reading and encoding of data into an electronic circuit with non-volatile storage embodied in plastic cards, coins or other non-ferrous objects, for use with security access control cards, debit and pre-paid cards, payroll and timecards, skilift passes, transportation fare cards, and other applications and market places requiring secured data storage and encoding a portab...