US3564518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic single wall domain propagation device
Assignee: AT&T Inc
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Filing: 1969-04-04
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Granted: 1971-02-16
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Expires: 1989-04-04
Abstract
Abstract AN OVERLAY ARRAY OF MAGNETICALLY SOFT DOTS PERMITS A REDUCTION IN THE COMPLEXITY OF A DRIVE WIRING CONFIGURATION FOR PROPAGATING SINGLE WALL DOMAINS. THE DOTS ARE OFFSET WITH RESPECT TO THE WIRING CONFIGURATION DEFINING AN ASTABLE POSITION INTO WHICH A DOMAIN IS MOVED IN EACH INSTANCE. UNIDIRECTIONAL MOVEMENT OF DOMAINS IS ENSURED BY THE DOTS THUS PERMITTING TWO-PHASE PROPAGATION OPERATION AND A PLANAR GEOMETRY FOR THE WIRING.
Inventors
- 👤 Robert F Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:56
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0808; G11C19/0841
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |