Patent US3149901A successfully refreshed from Google Patents.
US3149901A
Expired / Lapsed
US
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Recorder
Assignee: AT&T Inc
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Filing: 1960-11-17
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Granted: 1964-09-22
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Expires: 1980-11-17
Abstract
No abstract record available.
Inventors
- 👤 David W Hagelbarger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:41
CPC Classifications
G; G06; G06K; G06K1/00; G06K1/12; H; H04; H04N; H04N1/00; H04N1/024; H04N1/032; H04N1/0323
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
IN A RECORDER, A MARKING DEVICE COMPRISING, IN COMBINATION, A MAGNETIC CORE STRUCTURE HAVING A CAVITY THEREIN, A MECHANICALLY INDEPENDENT SPHERICAL MARKING ELEMENT MOVABLY POSITIONED AND FREELY ROTATBLE IN SAID CAVITY AND IN FLUX CONNECTING RELATIONSHIP WITH SAID CORE STRUCTURE, MEANS FOR POSITIONING A RECORDING MEDIUM ADJACENT SAID MARKING ELEMENT, AND MEANS FOR SELECTIVELY MOVING SAID MARKING ELEMENT INTO CONTACT WITH SAID RECORDING MEDIUM, SAID MOVING MEANS COMPRISING MEANS FOR INDUCING MAGNETIC FLUX INTO SAID CORE STRUCTURE.
Claim 2
Dependent Claim
77 words
IN A RECORDER, A MARKING DEVICE COMPRISING, IN COMBINATION, A MAGNETIC CORE STRUCTURE HAVING A CAVITY THEREIN, A MECHANICALLY INDEPENDENT SPHERICAL MARKING ELEMENT MOVABLY POSITIONED AND FREELY ROTATBLE IN SAID CAVITY AND IN FLUX CONNECTING RELATIONSHIP WITH SAID CORE STRUCTURE, MEANS FOR POSITIONING A RECORDING MEDIUM ADJACENT SAID MARKING ELEMENT, AND MEANS FOR SELECTIVELY MOVING SAID MARKING ELEMENT INTO CONTACT WITH SAID RECORDING MEDIUM, SAID MOVING MEANS COMPRISING MEANS FOR INDUCING MAGNETIC FLUX INTO SAID CORE STRUCTURE.
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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |