US3247464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Audio amplifier including volume compression means
Assignee: RCA Corp
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Filing: 1961-09-08
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Granted: 1966-04-19
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Expires: 1981-09-08
Abstract
No abstract record available.
Inventors
- 👤 William B Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:20
CPC Classifications
H; H03; H03G; H03G7/00; H03G7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
AN AMPLIFIER COMPRISING A PLURALITY OF AMPLIFIER STAGES COUPLED IN CASCADE, ONE OF SAID PLURALITY OF STAGES HAVING A GAIN CONTROL ELEMENT, VOLUME COMPRESSION MEANS COUPLED TO ONE OF SAID PLURALITY OF AMPLIFIER STAGES OTHER THAN SAID FIRST STAGE FOR DERIVING SIGNAL ENERGY FROM SAID ONE OF SAID PLURALITY OF AMPLIFIER STAGES, FOR RECTIFYING SAID SIGNAL ENERGY AND FOR APPLYING SAID RECTIFIED SIGNAL ENERGY IN A SIGNAL COMPRESSION DIRECTION TO THE GAIN CONTROL ELEMENT, BEING MEANS COUPLED TO SAID VOLUME COMPRESSION MEANS FOR APPLYING A CONTROLLABLE COMPRESSION DELAY VOLTAGE TO SAID VOLUME COMPRESSION MEANS, A VOLUME CONTROL MEANS COUPLED TO ONE OF SAID PLURALITY OF STAGES OTHER THAN SAID STAGE HAVING A GAIN CONTROL ELEMENT TO CONTROL THE OUTPUT OF SAID AMPLIFIER, AND
Claim 2
Dependent Claim
123 words
AN AMPLIFIER COMPRISING A PLURALITY OF AMPLIFIER STAGES COUPLED IN CASCADE, ONE OF SAID PLURALITY OF STAGES HAVING A GAIN CONTROL ELEMENT, VOLUME COMPRESSION MEANS COUPLED TO ONE OF SAID PLURALITY OF AMPLIFIER STAGES OTHER THAN SAID FIRST STAGE FOR DERIVING SIGNAL ENERGY FROM SAID ONE OF SAID PLURALITY OF AMPLIFIER STAGES, FOR RECTIFYING SAID SIGNAL ENERGY AND FOR APPLYING SAID RECTIFIED SIGNAL ENERGY IN A SIGNAL COMPRESSION DIRECTION TO THE GAIN CONTROL ELEMENT, BEING MEANS COUPLED TO SAID VOLUME COMPRESSION MEANS FOR APPLYING A CONTROLLABLE COMPRESSION DELAY VOLTAGE TO SAID VOLUME COMPRESSION MEANS, A VOLUME CONTROL MEANS COUPLED TO ONE OF SAID PLURALITY OF STAGES OTHER THAN SAID STAGE HAVING A GAIN CONTROL ELEMENT TO CONTROL THE OUTPUT OF SAID AMPLIFIER, AND
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |