US3293364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound signal correction system
Assignee: RCA Corp
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Filing: 1963-04-08
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Granted: 1966-12-20
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Expires: 1983-04-08
Abstract
No abstract record available.
Inventors
- 👤 Donald L Richter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:59
CPC Classifications
H; H03; H03G; H03G9/00; H03G9/02; H03G9/12; H03G9/18; H03G5/00; H03G5/02; H03G5/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN AN AUDIO FREQUENCY SIGNAL TRANSLATING SYSTEM FOR RECORDING HIGH LEVEL AUDIO FREQUENCY SIGNALS IN A MENNER THAT THE DYNAMIC LOUDNESS CHARACTERISTICS THEREOF ARE MAINTAINED WHEN SAID SIGNALS ARE REPRODUCED AT LOW LEVELS, THE COMBINATION COMPRISING A SIGNAL INPUT CIRCUIT FOR RECEIVING HIGH LEVEL AUDIO FREQUENCY SIGNALS, AND A SIGNAL OUTPUT CIRCUIT FOR DELIVERING A MODIFIED VERSION OF SAID AUDIO FREQUENCY SIGNALS FOR RECORDING, FIRST MEANS INTERCONNECTED BETWEEN SAID INPUT AND OUTPUT CIRCUITS AND RESPONSIVE TO THE LEVEL OF THE HIGH LEVEL AUDIO FREQUENCY SIGNALS APPLIED TO SAID INPUT CIRCUIT FOR COMPRESSING RELATIVELY LOW FREQUENCY COMPONENTS OF SAID AUDIO FREQUENCY SIGNALS APPLIED TO SAID INPUT CIRCUIT, AND SECOND MEANS INTERCONNECTING SAID INPUT AND OUTPUT CIRCUITS AND RESPONSIVE TO THE LEVEL OF THE HIGH LEVEL AUDIO FREQUENCY SIGNALS APPLIED TO SAID INPUT CIRCUIT FOR EXPANDING MID-FREQUENCY RANGE COMPONENTS OF SAID AUDIO FREQUENCY SIGNALS APPLIED TO SAID INPUT CIRCUIT.
Claim 2
Dependent Claim
147 words
IN AN AUDIO FREQUENCY SIGNAL TRANSLATING SYSTEM FOR RECORDING HIGH LEVEL AUDIO FREQUENCY SIGNALS IN A MENNER THAT THE DYNAMIC LOUDNESS CHARACTERISTICS THEREOF ARE MAINTAINED WHEN SAID SIGNALS ARE REPRODUCED AT LOW LEVELS, THE COMBINATION COMPRISING A SIGNAL INPUT CIRCUIT FOR RECEIVING HIGH LEVEL AUDIO FREQUENCY SIGNALS, AND A SIGNAL OUTPUT CIRCUIT FOR DELIVERING A MODIFIED VERSION OF SAID AUDIO FREQUENCY SIGNALS FOR RECORDING, FIRST MEANS INTERCONNECTED BETWEEN SAID INPUT AND OUTPUT CIRCUITS AND RESPONSIVE TO THE LEVEL OF THE HIGH LEVEL AUDIO FREQUENCY SIGNALS APPLIED TO SAID INPUT CIRCUIT FOR COMPRESSING RELATIVELY LOW FREQUENCY COMPONENTS OF SAID AUDIO FREQUENCY SIGNALS APPLIED TO SAID INPUT CIRCUIT, AND SECOND MEANS INTERCONNECTING SAID INPUT AND OUTPUT CIRCUITS AND RESPONSIVE TO THE LEVEL OF THE HIGH LEVEL AUDIO FREQUENCY SIGNALS APPLIED TO SAID INPUT CIRCUIT FOR EXPANDING MID-FREQUENCY RANGE COMPONENTS OF SAID AUDIO FREQUENCY SIGNALS APPLIED TO SAID INPUT CIRCUIT.
References Cited (Backward Citations)
US3229038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-19 | 1970-06-20 | 1970-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-19 | 1974-06-20 | 1974-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-19 | 1978-06-20 | 1978-12-20 | $7700.00 | Window Closed / Lapsed |