Abstract: A method for a key to selectively allow access to an unpowered enclosure having a lock controller is disclosed. The key provides wireless transmission of power with simultaneous transfer of data.

Abstract: A key for selectively allowing access to an enclosure having an unpowered lock and a lock controller is disclosed. The key comprises: a housing.

Abstract: A method for programming a key for selectively allowing access to at least one enclosure having a lock controlled by a lock controller is disclosed. The method comprises: detecting the key; identifying the key by a static key number and a key user; identifying the at least one authorized enclosure corresponding to the identified key; loading the at least one authorized enclosure identification onto the key; generating a plurality of date sensitive key access codes; and loading the plurality of date sensitive key access codes in the key.

Abstract: An electronic meter reader having a transmitter and antenna for inductively transmitting alternating current power in any selected one of a plurality of frequencies. The reader further includes a receiver for inductively receiving meter reading data from the meter being read represented by a load modulation of the transmitted frequency. A bandpass filter limits the bandwidth of the modulation frequency. The power transmitted by the transmitter may also be used by the meter to generate and transmit data representative of the meter reading back to the reader. A second receiver is also provided for inductively receiving reading data from the meter in the form of a modulated frequency generated by the meter. The reader includes a microprocessor and program which control the generation of a plurality of interrogation signal formats, and which decode a plurality of received data formats.