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US5376778A Expired / Lapsed US ⏱️ 0.0 years remaining

Contact-free chip card for remote transmission

Assignee: Angewandte Digital Elektronik GmbH
•
Filing: 1993-02-22
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Granted: 1994-12-27
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Expires: 2013-02-22
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Abstract

Abstract Chip cards that operate contact-free are supplemented by additional elements to enable remote transmission of data. Also, elements include sensors that enable the acquisition of physical, chemical or biological information from the environment of the card. Further, the card includes elements for storing electrical energy, electronic components for constructing an electronic oscillation circuit for the remote transmission and reception of data, as well as a switch accessible by a user for selectively connecting the energy storage elements to the electronic components thereby forming an electromagnetic oscillation circuit for the transmission of electromagnetic oscillations with information modulated thereon. In a preferred embodiment, one or both of the coils that are provided on the card are connected via the switch such that the coils serve as an antenna for the electromagnetic oscillation circuit for the remote transmission of data. In addition, the electronic oscillation circuit operates at a frequency which differs sufficiently from the frequency used in the short-distance transmission and also lies outside of the harmonics of the short-distance transmission so that a receiver of the information can differentiate merely on the basis of frequency, whether the remote transmission or the short-distance transmission is active.

Inventors

  • 👤 Hans-Diedrich Kreft

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 14:44
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/0716; G06K19/0717; G06K19/077; G06K19/07749; G06K7/00; G06K7/0008

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 89 words
In a contact-free chip card of the type having electronic component means including a microprocessor, a memory, and having at least one coil for the short distance transmission of energy and data" the improvement comprising: an oscillator means for storing electrical energy for contact-free, remote transmission of data; and enabling means accessible to a user for selectively connecting said energy storage means to said electronic component means to energize said oscillator and said at least one coil for said remote transmission, said enabling means being responsive to an input.
Claim 2
Dependent Claim 89 words
In a contact-free chip card of the type having electronic component means including a microprocessor, a memory, and having at least one coil for the short distance transmission of energy and data" the improvement comprising: an oscillator means for storing electrical energy for contact-free, remote transmission of data; and enabling means accessible to a user for selectively connecting said energy storage means to said electronic component means to energize said oscillator and said at least one coil for said remote transmission, said enabling means being responsive to an input.
Claim 3
Dependent Claim 45 words
A chip card according to claim 1, wherein said enabling means selectively connects said energy storage means to said oscillator to form an active electromagnetic oscillation circuit in combination with said energy storage means to produce a transmission of electromagnetic oscillations with information modulated thereon.
Claim 4
Dependent Claim 42 words
A chip card according to claim 2, wherein said enabling means connects said at least one coil of said electronic component means such that said coil serves as an antenna coil of said electromagnetic oscillation circuit for said remote transmission of data.
Claim 5
Dependent Claim 56 words
A chip card according to claim 2, wherein said electromagnetic oscillation circuit provides a frequency for said remote transmission that adequately differs from a frequency for short-distance transmission and said frequency further differs from the harmonics of said short-distance transmission, so that a receiver can differentiate whether said remote transmission or said short-distance transmission is active.
Claim 6
Dependent Claim 29 words
A chip card according to claim 1, further comprising information stored in said memory to enable said remote transmission when said input correlates with said stored memory context information.
Claim 7
Dependent Claim 32 words
A chip card according to claim 5, further comprising a sensor for the registration of at least one type of information selected from the group consisting of physical, chemical, and biological information.
Claim 8
Dependent Claim 23 words
A chip card according to claim 1, further comprising means for outputting said at least one type of information stored on said card.
Claim 9
Dependent Claim 26 words
A chip card according to claim 6, wherein said sensor is connected to said memory to deposit said information received from said sensor in said memory.
Claim 10
Dependent Claim 42 words
A chip card according to claim 6 wherein said sensor is connected to said microprocessor so that the information received from said sensor is capable of enabling said remote transmission when said information received from said sensor correlates with said stored information.
Claim 11
Dependent Claim 48 words
A chip card according to claim 1, wherein said enabling means accessible to a user for selectively connecting said means for storing electrical energy to said electronic components means to energize said at least one coil for said remote transmission is an external switch mounted on the card.

References Cited (Backward Citations)

GB534559A Cited
US4223830A Cited
US4697183A Cited
US4656472A Cited
US4797542A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1997-12-26 1998-06-27 1998-12-27 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2001-12-26 2002-06-27 2002-12-27 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2005-12-26 2006-06-27 2006-12-27 $7700.00 Window Closed / Lapsed

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