US4600829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic proximity identification and recognition system with isolated two-way coupling
Assignee: Individual
•
Filing: 1984-04-02
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Granted: 1986-07-15
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Expires: 2004-04-02
Abstract
Abstract An electronic proximity identification and recognition system. The identification and recognition sections are physically separate from one another, but inductively coupled to one another by two-way coupling. The identification section and recognition section each have a sending and a receiving antenna. The antennas in each section are structured to have virtually zero mutual inductance.
Inventors
- 👤 Charles A. Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:40
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/0008; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/0723; G07; G07C; G07C9/00; G07C9/20; G07C9/28
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
123 words
An electronic proximity recognition and identification system comprising: a recognition section including an oscillator for supplying an electrical signal to a power amplifier electrically coupled to said oscillator, a first reader antenna connected to said power amplifier for radiating electromagnetic power responsive to said power amplifier, a second reader antenna for receiving signals, the mutual inductance between said first and second reader antennas being approximately zero; and an electronic identifier section having a first identifier antenna for receiving radiated power from said first reader antenna, means for generating an identifier carrier frequency, and a second identifier antenna for radiating signals of said identifier carrier frequency to said second reader antenna, the mutual inductance between said first and second identifier antennas being approximately zero.
Claim 2
Dependent Claim
123 words
An electronic proximity recognition and identification system comprising: a recognition section including an oscillator for supplying an electrical signal to a power amplifier electrically coupled to said oscillator, a first reader antenna connected to said power amplifier for radiating electromagnetic power responsive to said power amplifier, a second reader antenna for receiving signals, the mutual inductance between said first and second reader antennas being approximately zero; and an electronic identifier section having a first identifier antenna for receiving radiated power from said first reader antenna, means for generating an identifier carrier frequency, and a second identifier antenna for radiating signals of said identifier carrier frequency to said second reader antenna, the mutual inductance between said first and second identifier antennas being approximately zero.
Claim 3
Dependent Claim
15 words
The system of claim 1, wherein said first and second reader antennas are loop antennas.
Claim 4
Dependent Claim
15 words
The system of claim 1 wherein said first and second identifier antennas are loop antennas.
Claim 5
Dependent Claim
15 words
The system of claim 2 wherein said first and second identifier antennas are loop antennas.
Claim 6
Dependent Claim
43 words
The system of claim 1, wherein the identifier section includes logic and memory means for modulating said identification carrier frequency signal, and second identifier antenna for radiating said identification carrier frequency signal which signal is responsive to a code within said memory means.
Claim 7
Dependent Claim
29 words
The system of claim 5 wherein said first reader antenna inductively couples to said first identifier antenna, and the second identifier antenna inductively couples to said second reader antenna.
Claim 8
Dependent Claim
33 words
The system of claim 1, wherein said oscillator of the recognition section, oscillates within the radio frequency range; and said means for generating said identification carrier frequency operates within the radio frequency range.
Claim 9
Dependent Claim
20 words
The system of claim 2, wherein said first and second reader antennas are tuned with capacitances to predetermined radio frequencies.
Claim 10
Dependent Claim
19 words
The system of claim 8 wherein said first and second identifier antennas are tuned with capacitance to predetermined frequencies.
Claim 11
Dependent Claim
21 words
The system of claim 5, wherein the recognition section includes a data processing unit for processing codes of said received signals.
Claim 12
Dependent Claim
22 words
The system of claim 10 wherein the recognition section further includes a radio frequency amplifier electrically coupled to said second reader antenna.
Claim 13
Dependent Claim
22 words
The system of claim 11 wherein said radio frequency amplifier includes means for automatic frequency control for locking onto the identifier frequency.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |