Method to prevent metered toner gray market leakage
US7677448B2 · kind B2 · utility
1Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2005 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Jan 18, 2028 |
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.