US3384839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse code modulator including a multifrequency oscillator
Assignee: AT&T Inc
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Filing: 1965-09-24
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Granted: 1968-05-21
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Expires: 1985-09-24
Abstract
No abstract record available.
Inventors
- 👤 Stewart E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:47
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A PULSE CODE MODULATION SYSTEM COMPRISING: A FREQUENCY MODULATED OSCILLATOR; MEANS INCLUDING AN AMPLITUDE-VARYING SIGNAL FOR FREQUENCY MODULATING SAID OSCILLATOR OVER A RANGE OF FREQUENCIES IN RESPONSE TO SAID SIGNAL; A MULTISTATE OSCILLATOR ADAPTED TO OSCILLATE AT ANY ONE OF A MULTIPLICITY OF DIFFERENT DISCRETE FREQUENCIES WITHIN SAID RANGE OF FREQUENCIES IN REPONSE TO EXCITATION BY WAVE ENERGY NEAR SAID ONE FREQUENCY; MEANS FOR PULSING SAID MULTISTATE OSCILLATOR ON AND OFF AT PRESCRIBED INTERVALS; MEANS FOR APPLYING WAVE ENERGY SAMPLES FROM SAID FREQUENCY MODULATED OSCILLATOR TO THE INPUT OF SAID MULTISTATE OSCILLATOR; AND MEANS FOR EXTRACTING WAVE ENERGY AT SAID DISCRETE FREQUENCIES DURING THE ON PERIODS OF SAID MULTISTATE OSCILLATOR.
Claim 2
Dependent Claim
110 words
A PULSE CODE MODULATION SYSTEM COMPRISING: A FREQUENCY MODULATED OSCILLATOR; MEANS INCLUDING AN AMPLITUDE-VARYING SIGNAL FOR FREQUENCY MODULATING SAID OSCILLATOR OVER A RANGE OF FREQUENCIES IN RESPONSE TO SAID SIGNAL; A MULTISTATE OSCILLATOR ADAPTED TO OSCILLATE AT ANY ONE OF A MULTIPLICITY OF DIFFERENT DISCRETE FREQUENCIES WITHIN SAID RANGE OF FREQUENCIES IN REPONSE TO EXCITATION BY WAVE ENERGY NEAR SAID ONE FREQUENCY; MEANS FOR PULSING SAID MULTISTATE OSCILLATOR ON AND OFF AT PRESCRIBED INTERVALS; MEANS FOR APPLYING WAVE ENERGY SAMPLES FROM SAID FREQUENCY MODULATED OSCILLATOR TO THE INPUT OF SAID MULTISTATE OSCILLATOR; AND MEANS FOR EXTRACTING WAVE ENERGY AT SAID DISCRETE FREQUENCIES DURING THE ON PERIODS OF SAID MULTISTATE OSCILLATOR.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |