US3312940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Central to remote signalling system having synchronized counters
Assignee: International Standard Electric Corp
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Filing: 1963-08-30
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Granted: 1967-04-04
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Expires: 1983-08-30
Abstract
No abstract record available.
Inventors
- 👤 Ekbergh Oskar Evert
- 👤 Jonsson Per Gustaf
- 👤 Fetz Walter Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:36
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A SIGNALING SYSTEM FOR TRANSMITTING DIGITAL INFORMATION OVER A TRANSMISSION LINK INTERCONNECTING CENTRAL OFFICE EQUIPMENT WITH REMOTELY LOCATED STATION EQUIPMENT COMPRISING DIGIT INDICATING MEANS IN THE STATION EQUIPMENT FOR INDICATING THE VALUE OF ANY DESIRED DIGIT TO BE TRANSMITTED, MEANS RESPONSIVE TO THE OPERATION OF SAID DIGIT INDICATING MEANS FOR TRANSMITTING A FIRST FREQUENCY OVER SAID LINK, MEANS IN THE SAID CENTRAL OFFICE EQUIPMENT RESPONSIVE TO THE RECEIPT OF SAID FIRST FREQUENCY FOR GENERATING A SECOND FREQUENCY, COUNTING MEANS IN THE SAID CENTRAL OFFICE EQUIPMENT AND SAID STATION EQUIPMENT FOR COUNTING THE NUMBER OF EACH CYCLE OF SAID SECOND FREQUENCY MEANS IN THE STATION EQUIPMENT RESPONSIVE TO THE NUMBER OF CYCLES OF SAID SECOND FREQUENCY COUNTED BY SAID COUNTING MEANS THEREIN CORRESPONDING TO THE SAID INDICATED DIGIT
Claim 2
Dependent Claim
127 words
A SIGNALING SYSTEM FOR TRANSMITTING DIGITAL INFORMATION OVER A TRANSMISSION LINK INTERCONNECTING CENTRAL OFFICE EQUIPMENT WITH REMOTELY LOCATED STATION EQUIPMENT COMPRISING DIGIT INDICATING MEANS IN THE STATION EQUIPMENT FOR INDICATING THE VALUE OF ANY DESIRED DIGIT TO BE TRANSMITTED, MEANS RESPONSIVE TO THE OPERATION OF SAID DIGIT INDICATING MEANS FOR TRANSMITTING A FIRST FREQUENCY OVER SAID LINK, MEANS IN THE SAID CENTRAL OFFICE EQUIPMENT RESPONSIVE TO THE RECEIPT OF SAID FIRST FREQUENCY FOR GENERATING A SECOND FREQUENCY, COUNTING MEANS IN THE SAID CENTRAL OFFICE EQUIPMENT AND SAID STATION EQUIPMENT FOR COUNTING THE NUMBER OF EACH CYCLE OF SAID SECOND FREQUENCY MEANS IN THE STATION EQUIPMENT RESPONSIVE TO THE NUMBER OF CYCLES OF SAID SECOND FREQUENCY COUNTED BY SAID COUNTING MEANS THEREIN CORRESPONDING TO THE SAID INDICATED DIGIT
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) | 1970-04-03 | 1970-10-03 | 1971-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-03 | 1974-10-03 | 1975-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-03 | 1978-10-03 | 1979-04-04 | $7700.00 | Window Closed / Lapsed |