Method to prevent metered toner gray market leakage
US8066183B2 · kind B2 · utility
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10References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 28, 2010 |
| Grant date | Nov 29, 2011 |
| Priority date | — |
| Expiry date | Jan 28, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2221/1892
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device, such as a printer or copier, identifies the type of module being used. If the type of module requires the device to receive an unlock code, the device prompts for the unlock code (which can be a hash of the serial number of the device). Once the unlock code is received, the device can be used with modules of that type. If the unlock code is not received, the device does not operate with modules of that type.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.