US3244818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording and reproducing apparatus
Assignee: RCA Corp
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Filing: 1962-08-08
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Granted: 1966-04-05
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Expires: 1982-08-08
Abstract
No abstract record available.
Inventors
- 👤 John D Bick
- 👤 David C Pastore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:04
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/48; G11B5/52; G11B5/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN A MAGNETIC RECORD DEVICE, A MAGNETIC RECORD TRANSDUCING MEANS INCLUDING AT LEAST ONE MAGNETIC HEAD FOR SUCCESSIVELY SCANNING PARALLEL RECORD TRACKS ON A MAGNETIC RECORD MEDIUM, SAID HEAD HAVING A CORE STRUCTURE COMPRISING: (A) A PAIR OF CORE LEGS HAVING POLE TIPS WHICH HAVE FACES DEFINING A SIGNAL GAP THEREBETWEEN, (B) SAID POLE TIPS HAVING A SURFACE FOR ENGAGING SAID MEDIUM TO SUCCESSIVELY SCAN SAID PARALLEL RECORD TRACKS WITH SAID POLE TIPS BEING INDENTED ALONG ONLY ONE SIDE THEREOF AT THEIR GAP-DEFINING FACES TO PROVIDE A NOTCH WHICH FACES AWAY FROM PREVIOUSLY SCANNED RECORD TRACKS.
Claim 2
Dependent Claim
96 words
IN A MAGNETIC RECORD DEVICE, A MAGNETIC RECORD TRANSDUCING MEANS INCLUDING AT LEAST ONE MAGNETIC HEAD FOR SUCCESSIVELY SCANNING PARALLEL RECORD TRACKS ON A MAGNETIC RECORD MEDIUM, SAID HEAD HAVING A CORE STRUCTURE COMPRISING: (A) A PAIR OF CORE LEGS HAVING POLE TIPS WHICH HAVE FACES DEFINING A SIGNAL GAP THEREBETWEEN, (B) SAID POLE TIPS HAVING A SURFACE FOR ENGAGING SAID MEDIUM TO SUCCESSIVELY SCAN SAID PARALLEL RECORD TRACKS WITH SAID POLE TIPS BEING INDENTED ALONG ONLY ONE SIDE THEREOF AT THEIR GAP-DEFINING FACES TO PROVIDE A NOTCH WHICH FACES AWAY FROM PREVIOUSLY SCANNED RECORD TRACKS.
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |