Electronic postage meter having redundant memory
US4566106A · kind A · utility
24Cited by
8References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 15, 1985 |
| Grant date | Jan 21, 1986 |
| Priority date | — |
| Expiry date | Apr 15, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07B2017/00411
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An electronic postal meter has an accounting unit with redundant nonvolatile random access memories controlled by a microprocessor system. The redundant random access memories have separate groups of address and data lines to minimize identical errors in data stored therein. The data transfer may occur at different times to and from the memories, with respect to any given byte of data. The system may incorporate redundant microprocessors, and critical parameters may be checked at periodic intervals in the main program of the accounting microprocessor system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.