US3226480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duplex data transmission system utilizing a telephone channel
Assignee: International Standard Electric Corp
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Filing: 1961-01-23
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Granted: 1965-12-28
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Expires: 1981-01-23
Abstract
No abstract record available.
Inventors
- 👤 Wright Esmond Philip Goodwin
- 👤 Terry Victor John
- 👤 Chittleburgh William Fr Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:53
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/14; H04L5/143; H04L1/00; H04L1/12; H04L1/14; H04L1/16; H04L1/18; H04M; H04M11/00; H04M11/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
APPARATUS FOR INTELLIGENCE TRANSMISSION COMPRISING; A SINGLE COMMUNICATION CHANEL OF LIMITED FREQUENCY BANDWIDTH; FIRST AND SECOND TERMINAL EQUIPMENT COUPLED TO OPPOSITE ENDS OF SAID CHANNEL FOR SIMULTANEOUS INTELLIGENCE TRANSMISSION IN BOTH DIRECTIONS OVER SAID CHANNEL; AND MEANS DISPOSED IN EACH OF SAID TERMINAL EQUIPMENTS TO DIVIDE THE BANDWIDTH OF SAID CHANNELS INTO TWO SUB-CHANNELS OF UNEQUAL BANDWIDTH, ONE OF SAID SUBCHANNELS BEING ALLOCATED FOR TRANSMISSION IN ONE DIRECTION OVER SAID CHANNEL AND THE OTHER OF SAID SUBCHANNELS BEING ALLOCATED FOR TRANSMISSION IN THE OPPOSITE DIRECTION OVER SAID CHANNEL; SAID FIRST TERMINAL EQUIPMENT INCLUDING FIRST TRANSMITTING MEANS COUPLED TO SAID ONE OF SAID SUB-CHANNELS FOR TRANSMITTING MESSAGE INTELLIGENCE; SAID SECOND TERMINAL EQUIPMENT INCLUDING SECOND TRANS MITTING MEANS COUPLED TO SAID OTHER OF SAID SUBCHANNELS FOR TRANSMITTING SUPERVISORY INTELLIGENCE; SAID TERMINAL EQUIPMENT INCLUDING MEAND FOR CHECKING SAID MESSAGE INTELLIGENCE FOR ERRORS OCCURING IN TRANSMISSION IN RESPONSE TO SAID MESSAGE INTELIGENCE AND SAIS SUPERVISORY INTELLIGENCE.
Claim 2
Dependent Claim
152 words
APPARATUS FOR INTELLIGENCE TRANSMISSION COMPRISING; A SINGLE COMMUNICATION CHANEL OF LIMITED FREQUENCY BANDWIDTH; FIRST AND SECOND TERMINAL EQUIPMENT COUPLED TO OPPOSITE ENDS OF SAID CHANNEL FOR SIMULTANEOUS INTELLIGENCE TRANSMISSION IN BOTH DIRECTIONS OVER SAID CHANNEL; AND MEANS DISPOSED IN EACH OF SAID TERMINAL EQUIPMENTS TO DIVIDE THE BANDWIDTH OF SAID CHANNELS INTO TWO SUB-CHANNELS OF UNEQUAL BANDWIDTH, ONE OF SAID SUBCHANNELS BEING ALLOCATED FOR TRANSMISSION IN ONE DIRECTION OVER SAID CHANNEL AND THE OTHER OF SAID SUBCHANNELS BEING ALLOCATED FOR TRANSMISSION IN THE OPPOSITE DIRECTION OVER SAID CHANNEL; SAID FIRST TERMINAL EQUIPMENT INCLUDING FIRST TRANSMITTING MEANS COUPLED TO SAID ONE OF SAID SUB-CHANNELS FOR TRANSMITTING MESSAGE INTELLIGENCE; SAID SECOND TERMINAL EQUIPMENT INCLUDING SECOND TRANS MITTING MEANS COUPLED TO SAID OTHER OF SAID SUBCHANNELS FOR TRANSMITTING SUPERVISORY INTELLIGENCE; SAID TERMINAL EQUIPMENT INCLUDING MEAND FOR CHECKING SAID MESSAGE INTELLIGENCE FOR ERRORS OCCURING IN TRANSMISSION IN RESPONSE TO SAID MESSAGE INTELIGENCE AND SAIS SUPERVISORY INTELLIGENCE.
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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |