US3308232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording and reproducing device
Assignee: Sony Corp
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Filing: 1963-12-06
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Granted: 1967-03-07
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Expires: 1983-12-06
Abstract
No abstract record available.
Inventors
- 👤 Numakura Toshihiko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:41
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/78206; H04N5/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A MAGNETIC TRANSDUCER DEVICE COMPRISING (A) A MAGNETIC MEDIUM, (B) AN OBLIQUELY SCANNING MAGNETIC HEAD FOR SCANNING OBLIQUE MAGNETIC TRACKS ON SAID MAGNETIC MEDIUM CONTAINING VIDEO SIGNALS, (C) ANOTHER MAGNETIC HEAD FOR SCANNING A LONGITUDINAL MAGNETIC TRACK ON THE MAGNETIC MEDIUM CONTAINING CONTROL SIGNALS, SAID FIRST-MENTIONED MAGNETIC HEAD BEING COMPELLED TO SCAN THE LONGITUDINAL CONTROL SIGNAL TRACK, (D) CIRCUIT MEANS CONNECTED TO SAID FIRST-MENTIONED OBLIQUELY SCANNING MAGNETIC HEAD FOR RECEIVING REPRODUCED VIDEO SIGNAL COMPONENTS PRODUCED BY OBLIQUE SCANNING OF SAID OBLIQUE MAGNETIC TRACKS AND FOR RECEIVING REPRODUCED CONTROL SIGNAL COMPONENTS PRODUCED BY OBLIQUE SCANNING OF SAID LONGITUDINAL CONTROL SIGNAL TRACK, AND (E) SAID CIRCUIT MEANS HAVING A FREQUENCY SELECTIVE TRANSMISSION CHARACTERISTIC TO TRANSMIT ESSENTIAL FREQUENCY COMPONENTS OF SAID REPRODUCED VIDEO SIGNAL COMPONENTS BUT TO SUBSTANTIALLY ATTENUATE AND ESSENTIALLY TO ELIMINATE FREQUENCY COMPONENTS CORRESPONDING TO THE FUNDAMENTAL AND A PLURALITY OF HARMONICS OF SAID REPRODUCED CONTROL SIGNAL COMPONENTS FOR REMOVING SAID REPRODUCED CONTROL SIGNAL COMPONENTS DURING REPRODUCING.
Claim 2
Dependent Claim
156 words
A MAGNETIC TRANSDUCER DEVICE COMPRISING (A) A MAGNETIC MEDIUM, (B) AN OBLIQUELY SCANNING MAGNETIC HEAD FOR SCANNING OBLIQUE MAGNETIC TRACKS ON SAID MAGNETIC MEDIUM CONTAINING VIDEO SIGNALS, (C) ANOTHER MAGNETIC HEAD FOR SCANNING A LONGITUDINAL MAGNETIC TRACK ON THE MAGNETIC MEDIUM CONTAINING CONTROL SIGNALS, SAID FIRST-MENTIONED MAGNETIC HEAD BEING COMPELLED TO SCAN THE LONGITUDINAL CONTROL SIGNAL TRACK, (D) CIRCUIT MEANS CONNECTED TO SAID FIRST-MENTIONED OBLIQUELY SCANNING MAGNETIC HEAD FOR RECEIVING REPRODUCED VIDEO SIGNAL COMPONENTS PRODUCED BY OBLIQUE SCANNING OF SAID OBLIQUE MAGNETIC TRACKS AND FOR RECEIVING REPRODUCED CONTROL SIGNAL COMPONENTS PRODUCED BY OBLIQUE SCANNING OF SAID LONGITUDINAL CONTROL SIGNAL TRACK, AND (E) SAID CIRCUIT MEANS HAVING A FREQUENCY SELECTIVE TRANSMISSION CHARACTERISTIC TO TRANSMIT ESSENTIAL FREQUENCY COMPONENTS OF SAID REPRODUCED VIDEO SIGNAL COMPONENTS BUT TO SUBSTANTIALLY ATTENUATE AND ESSENTIALLY TO ELIMINATE FREQUENCY COMPONENTS CORRESPONDING TO THE FUNDAMENTAL AND A PLURALITY OF HARMONICS OF SAID REPRODUCED CONTROL SIGNAL COMPONENTS FOR REMOVING SAID REPRODUCED CONTROL SIGNAL COMPONENTS DURING REPRODUCING.
References Cited (Backward Citations)
US3239603A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |