US3944842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic domain logic device
Assignee: Individual
•
Filing: 1974-06-12
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Granted: 1976-03-16
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Expires: 1994-06-12
Abstract
Abstract A magnetic device comprising a first and a second plate of a magnetic material between which domains are situated. An interaction force occurs between the domains in the two plates. Stable domain positions in a second plate define equally stable domain positions in a first plate. One or both plates can be provided with domain guiding structures. Domain displacement in one plate can control a domain displacement in the other so that a variation in the interaction force is produced.
Inventors
- 👤 Jan Willem Frederik Dorleijn
- 👤 Willem Frederik Druyvesteyn
- 👤 Frederik Ate de Jonge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:42
CPC Classifications
H; H03; H03K; H03K19/00; H03K19/02; H03K19/16; H03K19/168; G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/0808; G11C19/0833
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
125 words
A magnetic device comprising a first plate of a magnetic material in which at least one domain is present, a domain guiding structure having a plurality of continuous branched connecting paths for the displacement of the domain in the first plate, a second plate of magnetic material in which a domain is present, said second plate covering, at least in projection, at least a part of the first plate, an interaction force occurring between at least one domain in the first and one domain in the second plate, and a domain guiding structure having at least one path for the displacement of a domain in the second plate which controls the displacement of the domain in the first plate along one of said paths therein.
Claim 2
Dependent Claim
125 words
A magnetic device comprising a first plate of a magnetic material in which at least one domain is present, a domain guiding structure having a plurality of continuous branched connecting paths for the displacement of the domain in the first plate, a second plate of magnetic material in which a domain is present, said second plate covering, at least in projection, at least a part of the first plate, an interaction force occurring between at least one domain in the first and one domain in the second plate, and a domain guiding structure having at least one path for the displacement of a domain in the second plate which controls the displacement of the domain in the first plate along one of said paths therein.
Claim 3
Dependent Claim
26 words
A magnetic device as claimed in claim 1 including means to vary the distance between the plates whereby the dimensions of the domains can be varied.
Claim 4
Dependent Claim
33 words
A magnetic device as claimed in claim 1 including means to vary a dimension of a domain in the second plate whereby the domain is displaceable in the direction of the guiding structure.
References Cited (Backward Citations)
US3523286A
Cited
US3676872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |