
US Patent No: 5,077,792
Number of patents in Portfolio can not be more than 2000
Franking system
Stats
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Dec 31, 1991
Issued date -
Dec 27, 1989
filing date -
07/457,836
serial no -
Expired
status
Importance
Abstract
Credit in a credit register of a franking meter is reset by telephone communication with a resetting terminal. A request for a selected credit amount is transmitted from the meter apparatus to the terminal and in response the terminal interrogates the meter to establish identity of the meter. The terminal locks the meter to prevent operation of the meter for franking while the resetting takes place. The terminal checks the validity of the reset request with customer records stored in the terminal and if valid transmits a reset signal which includes the credit reset amount and a pseudo-random number (TID) to enable the meter to reset its credit register. Upon completion of the resetting the meter sends a request including a random number for unlocking of the meter. The terminal requests the register values from the meter, each request including a random number. The meter transmits the register values together with the random number to the terminal. If the value and random number are correct, the terminal unlocks the meter by sending an unlock signal which includes the TID and random number.
First Claim
Related Publications
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,907,271 Secure transmission of information between electronic stations | 34 | 1988 | |
| 4,934,846 Franking system | 92 | 1989 | |
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| 4,787,045 Postage meter recharging system | 34 | 1986 | |
| 4,907,161 Batch mailing system | 28 | 1986 | |
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| 4,630,201 On-line and off-line transaction security system using a code generated from a transaction parameter and a random number | 304 | 1984 | |
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| 4,665,396 Validation check for remote digital station | 25 | 1985 | |