US3128353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission control in signaling system
Assignee: AT&T Inc
•
Filing: 1962-03-06
•
Granted: 1964-04-07
•
Expires: 1982-03-06
Abstract
No abstract record available.
Inventors
- 👤 Mark B Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:32
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN A SYSTEM FOR SUPPRESSING ECHOES IN A TWO-WAY SIGNALING CIRCUIT COMPRISING INCOMING AND OUTGOING ONEWAY PATHS, MEANS AT EACH TERMINAL OF SAID CIRCUIT FOR DIFFERENTIALLY RESPONDING TO THE AMPLITUDE OF SIGNALS IN BOTH OF SAID ONE-WAY PATHS, MEANS RESPONSIVE TO SAID DIFFERENTIAL RESPONSE FOR SMOOTHLY ALTERING THE TRANSMISSION EFFICIENCY OF SAID OUTGOING PATH AT A PRESCRIBED RATE, MEANS FOR PROVIDING A MEASURE OF THE NOISE LEVEL IN SAID PATHS, AND MEANS CONNECTED IN SAID INCOMING PATHS FOR CONTROLLING THE MAXIMUM PERMISSIBLE LEVEL OF INCOMING SIGNALS IN RESPONSE TO SAID MEASURE OF NOISE LEVEL.
Claim 2
Dependent Claim
94 words
IN A SYSTEM FOR SUPPRESSING ECHOES IN A TWO-WAY SIGNALING CIRCUIT COMPRISING INCOMING AND OUTGOING ONEWAY PATHS, MEANS AT EACH TERMINAL OF SAID CIRCUIT FOR DIFFERENTIALLY RESPONDING TO THE AMPLITUDE OF SIGNALS IN BOTH OF SAID ONE-WAY PATHS, MEANS RESPONSIVE TO SAID DIFFERENTIAL RESPONSE FOR SMOOTHLY ALTERING THE TRANSMISSION EFFICIENCY OF SAID OUTGOING PATH AT A PRESCRIBED RATE, MEANS FOR PROVIDING A MEASURE OF THE NOISE LEVEL IN SAID PATHS, AND MEANS CONNECTED IN SAID INCOMING PATHS FOR CONTROLLING THE MAXIMUM PERMISSIBLE LEVEL OF INCOMING SIGNALS IN RESPONSE TO SAID MEASURE OF NOISE LEVEL.
References Cited (Backward Citations)
US2852621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |