US5420922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for the safe transmission of messages
Assignee: Nybo Seal System AB
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Filing: 1994-02-17
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Granted: 1995-05-30
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Expires: 2014-02-17
Abstract
Abstract A system for safe transmission of a message with positive identification of the sender includes on the transmitter side telefax-type message-transmitting apparatus (10) and encryption means (22) for encrypting transmission signals from the telefax apparatus prior to transmission, and includes on the receiver side decryption means (25) for decrypting incoming signals prior to their receipt in telefax-type apparatus (20), and message enveloping and message gathering means (21) for safe storage of messages received by the telefax apparatus (20) in an enveloped form within a closed casing (11). Activating means (23) on the transmitter side includes a card reader (231) and keyboard (232) and is intended to activate the encryption means (22) in response to signals from the card reader (231) and the keyboard (232). Control means (24) on the receiver side function are adapted to activate the decryption means (25) in response to signals emanating from the card reader (231) and the keyboard (232). The control means (24) causes a marking to be applied to the top of each printed sheet commenced in the telefax apparatus (20) on the receiver side, this marking disclosing whether the transmitted message is an encrypted message or a clear language message.
Inventors
- 👤 Leif Lundblad
- 👤 Claes Bjorkman
- 👤 Lars Eklund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:07
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/44; H04N1/4446; H04N1/4406; H04N1/4413; H04N1/4426; H04N1/446; H04N1/4466; H04N1/448; H04N1/4486
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
168 words
A system for safe transmission of a message by a sender to a recipient, comprising: (a) transmitting apparatus adapted to transmit the message as outgoing first signals; said transmitting apparatus including encryption means for selectively encrypting said first signals; (b) receiving apparatus adapted to receive said first signals such that the message is printed on sheet(s) of paper contained in said receiving apparatus; said receiving apparatus including decryption means for selectively decrypting said first signals; (c) control means for selective activation of said decryption means in response to receipt of second signals; and (d) activating means, including: (1) a "smart" card, (2) a card reader adapted to read said "smart" card, and (3) a keyboard; (e) wherein insertion of said "smart" card only in said card reader of said transmitting apparatus and selective keying only of said keyboard of said transmitting apparatus are adapted to selectively and cooperatively: (1) activate said encryption means, and (2) cause said transmitting apparatus to transmit said second signals to said control means.
Claim 2
Independent Claim
168 words
A system for safe transmission of a message by a sender to a recipient, comprising: (a) transmitting apparatus adapted to transmit the message as outgoing first signals; said transmitting apparatus including encryption means for selectively encrypting said first signals; (b) receiving apparatus adapted to receive said first signals such that the message is printed on sheet(s) of paper contained in said receiving apparatus; said receiving apparatus including decryption means for selectively decrypting said first signals; (c) control means for selective activation of said decryption means in response to receipt of second signals; and (d) activating means, including: (1) a "smart" card, (2) a card reader adapted to read said "smart" card, and (3) a keyboard; (e) wherein insertion of said "smart" card only in said card reader of said transmitting apparatus and selective keying only of said keyboard of said transmitting apparatus are adapted to selectively and cooperatively: (1) activate said encryption means, and (2) cause said transmitting apparatus to transmit said second signals to said control means.
Claim 3
Dependent Claim
40 words
The system according to claim 1, wherein said activating means is activated by insertion of said "smart" cart into said card reader by the sender and by entry of a personal identification number (PIN) into said keyboard by the sender.
Claim 4
Dependent Claim
45 words
The system according to claim 1, wherein: (a) said "smart" card contains a card number; and (b) said encryption means and said decryption means are activated by entry of a personal identification number (PIN), associated with said card number, into said keyboard by the sender.
Claim 5
Dependent Claim
19 words
The system according to claim 3, wherein said card number is printed on said sheet(s) printed with the message.
Claim 6
Dependent Claim
29 words
The system according to claim 3, wherein said card number is printed on said sheet(s) that is printed with a message that was encrypted during transmission of the message.
Claim 7
Dependent Claim
29 words
The system according to claim 5, wherein a marking is printed on said sheet(s) printed with the message, said marking indicating that the message was encrypted during transmission thereof.
Claim 8
Dependent Claim
29 words
The system according to claim 1, wherein a marking is printed on said sheet(s) printed with the message, said marking indicating that the message was encrypted during transmission thereof.
Claim 9
Dependent Claim
30 words
The system according to claim 1, wherein a marking is printed on said sheet(s) printed with the message, said marking indicating that the message was not encrypted during transmission thereof.
Claim 10
Dependent Claim
35 words
The system according to claim 1, including a closed casing having enveloping and gathering means such that said sheet(s) printed with the message which is selectively directed into said closed casing is gathered and enveloped.
References Cited (Backward Citations)
US3439469A
Cited
US3465492A
Cited
US3849968A
Cited
US3752904A
Cited
US4202150A
Cited
US3973373A
Cited
JPS58215864A
Cited
WO1986002799A1
Cited
WO1986005344A1
Cited
US5099335A
Cited
US4701233A
Cited
US4739377A
Cited
GB2217949A
Cited
EP0438930A1
Cited
US5311595A
Cited
EP0406198A2
Cited
SE464215B
Cited
US5031379A
Cited
US5166977A
Cited
US5157726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-29 | 1998-11-28 | 1999-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-29 | 2002-11-28 | 2003-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-29 | 2006-11-28 | 2007-05-30 | $7700.00 | Window Closed / Lapsed |