US3238304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereophonic effect emphasizing system
Assignee: Victor Company of Japan Ltd
•
Filing: 1963-09-16
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Granted: 1966-03-01
•
Expires: 1983-09-16
Abstract
No abstract record available.
Inventors
- 👤 Yaita Mitsuru
- 👤 Ota Kazuho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:37
CPC Classifications
H; H04; H04S; H04S1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A STEREOPHONIC EFFECT-EMPHASIZING SYSTEM COMPRISING AN AMPLIFYING DEVICE HAVING AMPLIFYING SYSTEMS OF TWO CHANNELS EACH OF WHICH SYSTEMS IS PROVIDED WITH A NEGATIVE FEEDBACK CIRCUIT; TWO SOUND-GENERATING DEVICES EACH DEVICE BEING CONNECTED WITH AN OUTPUT OF SAID AMPLIFYING DEVICE; MEANS FOR APPLYING ONE PART OF THE SIGNAL PASSING THROUGH EACH CHANNEL ALTERNATELY TO THE OTHER CHANNEL TO GENERATE A REPRODUCED SOUND IN THE REVERSE PHASE ALTERNATELY FROM THE OTHER SOUND-GENERATING DEVICE; AND MEANS, PROVIDED BETWEEN BOTH OF SAID CHANNELS, FOR VARYING THE AMOUNT OF FEEDBACK OF SAID NEGATIVE FEEDBACK CIRCUITS THEREBY EXPANDING THE SOUND VOLUME DIFFERENCE BETWEEN THE REPRODUCED SOUNDS FROM BOTH OF SAID SOUND-GENERATING DEVICES.
Claim 2
Dependent Claim
106 words
A STEREOPHONIC EFFECT-EMPHASIZING SYSTEM COMPRISING AN AMPLIFYING DEVICE HAVING AMPLIFYING SYSTEMS OF TWO CHANNELS EACH OF WHICH SYSTEMS IS PROVIDED WITH A NEGATIVE FEEDBACK CIRCUIT; TWO SOUND-GENERATING DEVICES EACH DEVICE BEING CONNECTED WITH AN OUTPUT OF SAID AMPLIFYING DEVICE; MEANS FOR APPLYING ONE PART OF THE SIGNAL PASSING THROUGH EACH CHANNEL ALTERNATELY TO THE OTHER CHANNEL TO GENERATE A REPRODUCED SOUND IN THE REVERSE PHASE ALTERNATELY FROM THE OTHER SOUND-GENERATING DEVICE; AND MEANS, PROVIDED BETWEEN BOTH OF SAID CHANNELS, FOR VARYING THE AMOUNT OF FEEDBACK OF SAID NEGATIVE FEEDBACK CIRCUITS THEREBY EXPANDING THE SOUND VOLUME DIFFERENCE BETWEEN THE REPRODUCED SOUNDS FROM BOTH OF SAID SOUND-GENERATING DEVICES.
References Cited (Backward Citations)
US3170991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |