Abstract: An aftermarket electronic circuit has a first data processor and a second data processor, the first data processor adapted to communicate with an imaging machine having a processor associated with a block of memory dedicated for an imaging unit blocking list having at least one blocking position. The second data processor contains blocking data, and the first data processor is adapted to access the blocking data from the second data processor. The first data processor is adapted to provide the blocking data to be read by the imaging machine and written to at least one byte of each available blocking position of the blocking list.

Abstract: An aftermarket electronic circuit has a first data processor and a second data processor, the first data processor adapted to communicate with an imaging machine having a processor associated with a block of memory dedicated for an imaging unit blocking list having at least one blocking position. The second data processor contains blocking data, and the first data processor is adapted to access the blocking data from the second data processor. The first data processor is adapted to provide the blocking data to be read by the imaging machine and written to at least one byte of each available blocking position of the blocking list.

Abstract: An electronic circuit for use with a consumable imaging unit comprises information configured to transform said electronic circuit from a communicated state to a non communicated state. Additionally, the information of the circuit is configured to alter an identifier of the circuit. The information of the circuit is also configured to point an imaging machine to communicate with a second element of the circuit after the information determines that a first element of the circuit has been altered from its original state.

Abstract: An aftermarket electronic circuit has a first discrete bi-directional communication module and a second discrete bi-directional communication module, the first discrete bi-directional communication module adapted to communicate with an imaging machine having a processor associated with a block of memory dedicated for an imaging unit blocking list having at least one blocking position. The second discrete bi-directional communication module contains blocking data, and the first discrete bi-directional communication module is adapted to access the blocking data from the second discrete bi-directional communication module. The first discrete bi-directional communication module is adapted to provide the blocking data to be read by the imaging machine and written to at least one byte of each available blocking position of the blocking list.

Abstract: An electronic circuit for use with a consumable imaging unit transforms the electronic circuit from a communicated state to a non communicated state, and also induces an imaging machine to read the electronic circuit's transformed information and then store the information in the imaging machine's memory. Additionally, the information of the circuit is configured to alter an identifier of the circuit. The information of the circuit is also configured to point an imaging machine to communicate with a second element of the circuit after the information determines that a first element of the circuit has been altered from its original state.

Abstract: An electronic circuit for use with a consumable imaging unit comprises information configured to transform said electronic circuit from a communicated state to a non communicated state. Additionally, the information of the circuit is configured to alter an identifier of the circuit. The information of the circuit is also configured to point an imaging machine to communicate with a second element of the circuit after the information determines that a first element of the circuit has been altered from its original state.

Abstract: An electronic circuit for use with a consumable imaging unit comprises information configured to transform the electronic circuit from a communicated state to a non communicated state, and also transform information in an imaging machine. Additionally, the information of the circuit is configured to alter an identifier of the circuit. The information of the circuit is also configured to point an imaging machine to communicate with a second element of the circuit after the information determines that a first element of the circuit has been altered from its original state.

Abstract: A method of making an electronic circuit for activating an imaging machine includes providing a first electronic circuit that is not capable of authenticating itself to the imaging machine; providing a second electronic circuit comprising an electronic component that is capable of authenticating itself to the imaging machine; removing the electronic component from the second electronic circuit; and electrically connecting the electronic component to the first electronic circuit, such that the first electronic circuit can use the electronic component to authenticate the first electronic circuit to the imaging machine.

Abstract: A toner cartridge having a microcontroller configured to store data necessary to create a message authentication code required by the printer. The microcontroller contains data values capable of generating acceptable MACs for a plurality of printers used in a plurality of geographic regions. The microcontroller recognizes a variety of unique parameters displayed by the printer's processor to identify the geographic region of the printer being used. Once the printer and geographic region are identified, the microcontroller loads the data values associated with the printer and generates an acceptable MAC to enable printer operation.

Abstract: A toner cartridge having a microcontroller configured to store data necessary to create a message authentication code required by the printer. The microcontroller contains data values capable of generating acceptable MACs for a plurality of printers. The microcontroller recognizes a variety of unique parameters displayed by the printer's processor to identify the printer being used. Once the printer is identified, the microcontroller loads the data values associated with the printer and generates an acceptable MAC to enable printer operation.

Abstract: A system for detecting the presence, in an audio channel which may contain voice signals, of a tone at a frequency selectable from among a plurality of selectable frequencies. A bandpass filter receives the audio input; its center frequency is selectable in response to a control signal. A first detector circuit provides from the output of the bandpass filter an output signal when a tone containing substantial energy at about said center frequency is input to the filter. A band-stop filter having the same center frequency as the bandpass filter also receives the input audio; a second detector circuit demodulates and thresholds the band-stop filter output.