US4215812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic information carrier
Assignee: Thales Avionics SAS
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Filing: 1979-01-18
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Granted: 1980-08-05
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Expires: 1999-01-18
Abstract
Abstract A magnetic information carrier comprising two magnetic tracks. One track contains coded magnetic information and the other track is deposited in depressions formed in the carrier and filled with a magnetic liquid, for displaying some of the coded magnetic information of the first track.
Inventors
- 👤 Georges Chancel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:16
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/08; G06K19/10; G06K19/12; G06K7/00; G06K7/08; G06K7/082
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A magnetic information carrier comprising two magnetic tracks, and in which at least some magnetic information of the carrier may be displayed, due to the positioning of zones of concentration of magnetic particles of a liquid and due to other readable information printed on the carrier, characterized in that one of the two tracks is a track containing coded magnetic information and the other of the two tracks is a track for displaying at least some of said coded magnetic information, said display track being deposited in a series of parallel longitudinal depressions formed in the carrier and filled with said magnetic liquid.
Claim 2
Dependent Claim
103 words
A magnetic information carrier comprising two magnetic tracks, and in which at least some magnetic information of the carrier may be displayed, due to the positioning of zones of concentration of magnetic particles of a liquid and due to other readable information printed on the carrier, characterized in that one of the two tracks is a track containing coded magnetic information and the other of the two tracks is a track for displaying at least some of said coded magnetic information, said display track being deposited in a series of parallel longitudinal depressions formed in the carrier and filled with said magnetic liquid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-05 | 1984-02-04 | 1984-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-05 | 1988-02-04 | 1988-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-05 | 1992-02-04 | 1992-08-05 | $7700.00 | Window Closed / Lapsed |