US3219922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing apparatus for information storage devices
Assignee: International Computers and Tabulators Ltd
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Filing: 1961-11-14
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Granted: 1965-11-23
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Expires: 1981-11-14
Abstract
No abstract record available.
Inventors
- 👤 James John Bernard
- 👤 Steptoe Brian John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:37
CPC Classifications
G; G11; G11C; G11C29/00; G11C29/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
APPARATUS FOR TESTING CHARACTERISTICS OF AN ANISOTROPIC MAGNETIC THIN FILM, INCLUDING A CONDUCTOR ASSEMBLY COMPRISING A GROUP OF PICK-CONDUCTORS, A FIRST GROU OF DRIVING CONDUCTORS AND A SECOND GROUP OF DRIVINGA CONDUCTORS INTERSECTING SAID FIRST GROUP; MEANS TO LOCATE THE FILM TO BE TESTED RELATIVE TO SAID CONDUCTOR ASSEMBLY; PRESSURE EXERTING MEANS FOR PRESSING THE FILM AND THE CONDUCTOR ASSEMBLY INTO CLOSE RELATIONSHIP; MEANS TO APPLY DRIVING SIGNALS TO A SELECTED CONDUCTOR OF SAID FIRST GROUP AND A SELECTED CONDUCTOR OF SAID SECOND GROUP TO CHANGE THE DIRECTION OF MAGNETIZATION OF THAT PORTION OF SAID FILM WHICH LIES ADJACENT THE INTERSECTION OF SAID SELECTED CONDUCTORS; AND MEANS TO REGISTER AN OUTPUT SIGNAL GENERATED IN ONE OF SAID PICK-UP CONDUCTORS IN RESPONSE TO THE CHANGE OF DIRECTION OF MAGNETIZATION OF SAID PORTION.
Claim 2
Dependent Claim
131 words
APPARATUS FOR TESTING CHARACTERISTICS OF AN ANISOTROPIC MAGNETIC THIN FILM, INCLUDING A CONDUCTOR ASSEMBLY COMPRISING A GROUP OF PICK-CONDUCTORS, A FIRST GROU OF DRIVING CONDUCTORS AND A SECOND GROUP OF DRIVINGA CONDUCTORS INTERSECTING SAID FIRST GROUP; MEANS TO LOCATE THE FILM TO BE TESTED RELATIVE TO SAID CONDUCTOR ASSEMBLY; PRESSURE EXERTING MEANS FOR PRESSING THE FILM AND THE CONDUCTOR ASSEMBLY INTO CLOSE RELATIONSHIP; MEANS TO APPLY DRIVING SIGNALS TO A SELECTED CONDUCTOR OF SAID FIRST GROUP AND A SELECTED CONDUCTOR OF SAID SECOND GROUP TO CHANGE THE DIRECTION OF MAGNETIZATION OF THAT PORTION OF SAID FILM WHICH LIES ADJACENT THE INTERSECTION OF SAID SELECTED CONDUCTORS; AND MEANS TO REGISTER AN OUTPUT SIGNAL GENERATED IN ONE OF SAID PICK-UP CONDUCTORS IN RESPONSE TO THE CHANGE OF DIRECTION OF MAGNETIZATION OF SAID PORTION.
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |