US3159822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-element magnetic transducer
Assignee: International Business Machines Corp
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Filing: 1962-01-22
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Granted: 1964-12-01
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Expires: 1982-01-22
Abstract
No abstract record available.
Inventors
- 👤 Jacob J Hagopian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:21
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/265; G11B5/02; G11B5/09
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
APPARATUS FOR MAGNETICALLY RECORDING A PLURALITY OF SIGNALS AND FOR READING BACK SAID SIGNALS COMPRISING A MAGNETIC CORE STRUCTURE INCLUDING A PAIR OF LEG PORTIONS AND A NARROW READ GAP DEFINED THEREBY, A PLURALITY OF ELECTRICALLY SEPARATE WINDING IN ONE LEG PORTION OF SAID CORE STRUCTURE, SAID PLURALITY OF WINDINGS FORMING SEPARATE MAGNETIC RECORDING ELEMENTS EXTENDING PARALLEL TO THE READ GAP, MEANS FOR SIMULTANEOUSLY SUPPLYING A PLURALITY OF SIGNALS TO BE RECORDED TO SAID WINDINGS TO SIMULTANEOUSLY RECORD SAID SIGNALS ON A COOPERATING MAGNETIC RECORD MEMBER, AND A SINGLE MAGNETIC READING WINDING ON A LEG PORTION OF SAID CORE STRUCTURE FOR SEQUENTIALLY REPRODUCING THE SIGNALS RECORDED BY SAID PLURALITY OF RECORDING ELEMENTS.
Claim 2
Dependent Claim
112 words
APPARATUS FOR MAGNETICALLY RECORDING A PLURALITY OF SIGNALS AND FOR READING BACK SAID SIGNALS COMPRISING A MAGNETIC CORE STRUCTURE INCLUDING A PAIR OF LEG PORTIONS AND A NARROW READ GAP DEFINED THEREBY, A PLURALITY OF ELECTRICALLY SEPARATE WINDING IN ONE LEG PORTION OF SAID CORE STRUCTURE, SAID PLURALITY OF WINDINGS FORMING SEPARATE MAGNETIC RECORDING ELEMENTS EXTENDING PARALLEL TO THE READ GAP, MEANS FOR SIMULTANEOUSLY SUPPLYING A PLURALITY OF SIGNALS TO BE RECORDED TO SAID WINDINGS TO SIMULTANEOUSLY RECORD SAID SIGNALS ON A COOPERATING MAGNETIC RECORD MEMBER, AND A SINGLE MAGNETIC READING WINDING ON A LEG PORTION OF SAID CORE STRUCTURE FOR SEQUENTIALLY REPRODUCING THE SIGNALS RECORDED BY SAID PLURALITY OF RECORDING ELEMENTS.
References Cited (Backward Citations)
GB882779A
Cited
US3103665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |