Patent US3424869A successfully refreshed from Google Patents.
US3424869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital speech interpolation communication system
Assignee: AT&T Inc
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Filing: 1965-06-15
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Granted: 1969-01-28
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Expires: 1985-06-15
Abstract
No abstract record available.
Inventors
- 👤 Frederick N Anderson
- 👤 Richard N Kennedy
- 👤 Robert A Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:20
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/17; H04J3/172
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
99 words
APPARATUS FOR INCREASING THE EFFECTIVE TRANSMISSION RATE OF DIGITAL CODE WORDS REPRESENTING ENERGY BURSTS OF A SPEECH WAVE WHICH IS CHARACTERIZED BY SILIENT INTERVALS BETWEEN SAID ERERGY BURSTS WHICH COMPRISES: A TRANSMITTER INCLUDING: MEANS FOR SEPARATING DIGITAL CODE WORDS REPRESENTING EACH OF SAID ENERGY BURSTS INTO MOST AND LEAST SIGNIFICANT PARTS, MEANS FOR TRANSMITTING TO A RECEIVER DURING EACH ENERGY BURST THE MOST SIGNIFICANT PART OF SAID DIGITAL CODE WORDS, AND MEANS FOR TRANSMITTING TO SAID RECEIVER DURING THE SILENT INTERVAL FOLLOWING EACH ENERGY BURST THE LEAST SIGNIFICANT PART OF SAID DIGITAL CODE WORDS REPRESENTING SAID PRECEDING ENERGY BURST.
References Cited (Backward Citations)
US2961492A
Cited
US3158693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-28 | 1972-07-29 | 1973-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-28 | 1976-07-29 | 1977-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-28 | 1980-07-29 | 1981-01-28 | $7700.00 | Window Closed / Lapsed |