Universal printer chip

Details Universal printer chip Universal printer chip

2007-10-23

2007-10-23

Brase, Sandra L. (Department: 2852)

Electrophotography

Diagnostics

Unit or part identification

C399S109000

Reexamination Certificate

active

11162878

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.

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Lexmark & IBM Introduce New Firmware to Thwart Aftermarket Cartridge Chips, Imaging Spectrum Magazine, Sep. 2002, p. 75.

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