US3341660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time division multiplex pulse code modulation communication systems
Assignee: Post Office
•
Filing: 1964-01-14
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Granted: 1967-09-12
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Expires: 1984-01-14
Abstract
No abstract record available.
Inventors
- 👤 Duerdoth Winston Theodore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:09
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/12; H04Q; H04Q11/00; H04Q11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A MULTICHANNEL PULSE MODULATION COMMUNICATION SYSTEM IN WHICH ONE DIGIT POSITION OF EACH CHANNEL IS ALLOCATED FOR THE TRANSMISSION OF SIGNALLING INFORMATION RELATING TO THE CHANNEL COMPRISING IN COMBINATION A PULSE TRANSMITTER, A CONTROL UNIT FOR SAID TRANSMITTER, A PLURALITY OF CONTROL LEADS FROM SAID CONTROL UNIT, DIFFERENT COMBINATIONS OF SAID LEADS EACH REPRESENTING A DIFFERENT TYPE OF SIGNALLING INFORMATION, A PULSE TRAIN SOURCE THE PULSES OF WHICH ARE COINCIDENT WITH SAID DIGIT POSITION, MEANS
Claim 2
Dependent Claim
75 words
A MULTICHANNEL PULSE MODULATION COMMUNICATION SYSTEM IN WHICH ONE DIGIT POSITION OF EACH CHANNEL IS ALLOCATED FOR THE TRANSMISSION OF SIGNALLING INFORMATION RELATING TO THE CHANNEL COMPRISING IN COMBINATION A PULSE TRANSMITTER, A CONTROL UNIT FOR SAID TRANSMITTER, A PLURALITY OF CONTROL LEADS FROM SAID CONTROL UNIT, DIFFERENT COMBINATIONS OF SAID LEADS EACH REPRESENTING A DIFFERENT TYPE OF SIGNALLING INFORMATION, A PULSE TRAIN SOURCE THE PULSES OF WHICH ARE COINCIDENT WITH SAID DIGIT POSITION, MEANS
References Cited (Backward Citations)
US3083267A
Cited
US3166734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |