Metering system with automatic resettable time lockout
US5920850A · kind A · utility
22Cited by
11References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1994 |
| Grant date | Jul 6, 1999 |
| Priority date | — |
| Expiry date | Nov 4, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07B2017/0079
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A postage metering system is provided with a countdown time. The countdown timer issues a priority interrupt when the timer has timed out which interrupts the control system of the meter in such a manner as to hold the meter in reset preventing operation of the postage meter. The timer is reset to a fixed period upon each funds recharge after the meter has been placed in recharge mode but prior to exposure of the secure accounting memory to recharge information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.