US4868846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for locking to the user's card in a portable radio telephone
Assignee: Nokia Inc
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Filing: 1988-07-19
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Granted: 1989-09-19
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Expires: 2008-07-19
Abstract
Abstract The invention relates to a method for the use of a portable radio telephone, which has a processor (4) controlling and supervising the operation, a keyboard (7) and a display (6), and a card reader (3), in which case, when the radio telephone is being used, the user identification data required by the radio telephone system are read from the card (1). The identification data (21) of the card (1) of the user authorized to use the radio telephone concerned are recorded in the non-erasable memory (5) of the processor (4), whereupon the radio telephone shifts into a mode locked to this card in such a way that its use is possible with only a certain card (1). By means of this method, protection is achieved against unauthorized use of the radio telephone.
Inventors
- 👤 Yrjo Kemppi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:26
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/72; H04M1/724; H04M1/66; H04M1/667; H04M1/67; H04M1/675; H04W; H04W12/00; H04W12/12; H04W12/126; H04W88/00; H04W88/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
185 words
A method for use in a mobile radio telephone operable in a general telephone network having radio telephone parts, a processor, a non-erasable read/write memory which controls and supervises operation, a keyboard, a display, a card reader, and a readable card, said method comprising the steps of: setting up said radio telephone for a call; reading user identification data required by said telephone into said card reader from said card; recording said identification data of said card of a specific user authorized to use said radio telephone into said memory of said processor; shifting said radio telephone to a locked mode; locking said card into said radio telephone, wherein said step of locking of said card is such that the use of said radio telephone in said locked mode is possible only with the use of said card which is specifically designated for said radio telephone; and shifting to an unlocking mode, wherein the step of shifting to said unlocking mode is possible with said card having said identification data having been recorded in said memory at the time of shifting to said locked mode.
Claim 2
Independent Claim
185 words
A method for use in a mobile radio telephone operable in a general telephone network having radio telephone parts, a processor, a non-erasable read/write memory which controls and supervises operation, a keyboard, a display, a card reader, and a readable card, said method comprising the steps of: setting up said radio telephone for a call; reading user identification data required by said telephone into said card reader from said card; recording said identification data of said card of a specific user authorized to use said radio telephone into said memory of said processor; shifting said radio telephone to a locked mode; locking said card into said radio telephone, wherein said step of locking of said card is such that the use of said radio telephone in said locked mode is possible only with the use of said card which is specifically designated for said radio telephone; and shifting to an unlocking mode, wherein the step of shifting to said unlocking mode is possible with said card having said identification data having been recorded in said memory at the time of shifting to said locked mode.
Claim 3
Dependent Claim
31 words
A method according to claim 1, wherein the step of shifting to the locked mode and out of it comprises the step of pressing a locking key arranged in the keyboard.
Claim 4
Dependent Claim
31 words
A method according to claim 1 or 2, wherein the step of shifting to the locked mode and out of it further comprises the step of keying in a several-digit code.
References Cited (Backward Citations)
US4439670A
Cited
JPS58125178A
Cited
US4480181A
Cited
US4670746A
Cited
US4759056A
Cited
GB2164227A
Cited
EP0254316A2
Cited
US4814593A
Cited
FR2607290A1
Cited
US4811387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |