Patent US3145269A successfully refreshed from Google Patents.
US3145269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of dynamic range and sensitivity of echo suppressor circuits
Assignee: AT&T Inc
•
Filing: 1962-05-16
•
Granted: 1964-08-18
•
Expires: 1982-05-16
Abstract
No abstract record available.
Inventors
- 👤 Mark B Gardner
- 👤 John R Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:37
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A SYSTEM FOR SUPPRESSING ECHOES IN A TWO-WAY SIGNALING CIRCUIT INCLUDING INCOMING AND OUTGOING ONE-WAY PATHS, COMPRISING, ADJUSTABLE MEANS FOR ALTERING THE TRANSMISSION EFFICIENCY OF SAID OUTGOING ONE-WAY PATH, FIRST MEANS FOR DIFFERENTIALLY RESPONDING TO THE AMPLITUDE OF SIGNALS IN BOTH OF SAID ONE-WAY PATHS, MEANS RESPONSIVE TO SAID FIRST DIFFERENTIAL RESPONSE FOR ESTABLISHING THE DYNAMIC RANGE THROUGH WHICH SAID ADJUSTABLE MEANS IS OPERATIVE, SECOND MEANS FOR DIFFERENTIALLY RESPONDING TO THE AMPLITUDE OF SIGNALS IN BOTH OF SAID ONE-WAY PATHS, MEANS RESPONSIVE TO SAID SECOND DIFFERENTIAL RESPONSE FOR SMOOTHLY ALTERING THE TRANSMISSION EFFICIENCY OF SAID OUTGOING PATH WITHIN SAID PRE-ESTABLISHED DYNAMIC RANGE, MEANS CONNECTED TO SAID ONE-WAY PATHS FOR RESPONDING TO THE NOISE LEVEL IN SAID TWO-WAY CIRCUIT, AND MEANS RESPONSIVE TO SAID NOISE RESPONSE FOR ADJUSTING THE SENSITIVITY OF SAID ADJUSTABLE MEANS.
Claim 2
Independent Claim
133 words
A SYSTEM FOR SUPPRESSING ECHOES IN A TWO-WAY SIGNALING CIRCUIT INCLUDING INCOMING AND OUTGOING ONE-WAY PATHS, COMPRISING, ADJUSTABLE MEANS FOR ALTERING THE TRANSMISSION EFFICIENCY OF SAID OUTGOING ONE-WAY PATH, FIRST MEANS FOR DIFFERENTIALLY RESPONDING TO THE AMPLITUDE OF SIGNALS IN BOTH OF SAID ONE-WAY PATHS, MEANS RESPONSIVE TO SAID FIRST DIFFERENTIAL RESPONSE FOR ESTABLISHING THE DYNAMIC RANGE THROUGH WHICH SAID ADJUSTABLE MEANS IS OPERATIVE, SECOND MEANS FOR DIFFERENTIALLY RESPONDING TO THE AMPLITUDE OF SIGNALS IN BOTH OF SAID ONE-WAY PATHS, MEANS RESPONSIVE TO SAID SECOND DIFFERENTIAL RESPONSE FOR SMOOTHLY ALTERING THE TRANSMISSION EFFICIENCY OF SAID OUTGOING PATH WITHIN SAID PRE-ESTABLISHED DYNAMIC RANGE, MEANS CONNECTED TO SAID ONE-WAY PATHS FOR RESPONDING TO THE NOISE LEVEL IN SAID TWO-WAY CIRCUIT, AND MEANS RESPONSIVE TO SAID NOISE RESPONSE FOR ADJUSTING THE SENSITIVITY OF SAID ADJUSTABLE MEANS.
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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |