US3204038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic switching telephone system
Assignee: TDK Micronas GmbH
•
Filing: 1961-05-29
•
Granted: 1965-08-31
•
Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Donald F Seemann
- 👤 Edward R Haskins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:14
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42; H04Q3/52; H04Q3/521; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/70; H03K17/72; H03K19/00; H03K19/02; H03K19/173; H03K19/177; H03K23/00; H03K23/002; H10; H10D; H10D84/00; H10D84/201; H10D84/204; H10D84/221; H10D84/60; H10D99/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
AN ELECTRONIC SWITCHING TELEPHONE SYSTEM COMPRISING A PLURALITY OF SUBSCRIBER LINES, EACH OF SAID LINES BEING TERMINATED BY AN INDIVIDUAL LINE CIRCUIT, A SELF-SEEKING MATRIX FOR EXTENDING CONNECTIONS BETWEEN SUBSCRIBER LINES, A PLURALITY OF LINKS FOR CONTROLLING THE EXTENSION OF CALLS THROUGH THE MATRIX, MARKER MEANS FOR SEQUENTIALLY APPLYING CYCLICALLY RECURRING TIME FRAME PULSES SUCCESSIVELY TO ENABLE EACH OF THE LINKS DURING TIME FRAMES WHICH INDIVIDUALLY IDENTIFY SAID LINKS, MEANS INCLUDING A PLURALITY OF DIGITAL BUSES FOR SELECTIVELY EXTENDING STORED DIRECTORY INFORMATION FROM THE LINKS OF THE LINE CIRCUITS, MEANS FOR SIMULTANEOUSLY ENERGIZING SAID BUSES AND MARKING ONE SIDE OF SAID MATRIX DURING ONE TIME FRAME WHICH IDENTIFIES A PARTICULAR ONE OF SAID LINKS, MEANS IN THE ONE OF SAID LINE CIRCUITS ASSOCIATED WITH THE LINE IDENTIFIED BY SAID DIRECTORY INFORMATION ON SAID DIGITAL BUSES FOR EXTENDING A MARKING TO THE OTHER SIDE OF SAID MATRIX DURING SAID ONE TIME FRAME, AND MEANS FOR EXTENDING A CONNECTION THROUGH THE MATRIX BETWEEN SAID MARKED SIDES DURING THE TIME FRAME WHICH IDENTIFIES SAID ONE LINK.
Claim 2
Dependent Claim
173 words
AN ELECTRONIC SWITCHING TELEPHONE SYSTEM COMPRISING A PLURALITY OF SUBSCRIBER LINES, EACH OF SAID LINES BEING TERMINATED BY AN INDIVIDUAL LINE CIRCUIT, A SELF-SEEKING MATRIX FOR EXTENDING CONNECTIONS BETWEEN SUBSCRIBER LINES, A PLURALITY OF LINKS FOR CONTROLLING THE EXTENSION OF CALLS THROUGH THE MATRIX, MARKER MEANS FOR SEQUENTIALLY APPLYING CYCLICALLY RECURRING TIME FRAME PULSES SUCCESSIVELY TO ENABLE EACH OF THE LINKS DURING TIME FRAMES WHICH INDIVIDUALLY IDENTIFY SAID LINKS, MEANS INCLUDING A PLURALITY OF DIGITAL BUSES FOR SELECTIVELY EXTENDING STORED DIRECTORY INFORMATION FROM THE LINKS OF THE LINE CIRCUITS, MEANS FOR SIMULTANEOUSLY ENERGIZING SAID BUSES AND MARKING ONE SIDE OF SAID MATRIX DURING ONE TIME FRAME WHICH IDENTIFIES A PARTICULAR ONE OF SAID LINKS, MEANS IN THE ONE OF SAID LINE CIRCUITS ASSOCIATED WITH THE LINE IDENTIFIED BY SAID DIRECTORY INFORMATION ON SAID DIGITAL BUSES FOR EXTENDING A MARKING TO THE OTHER SIDE OF SAID MATRIX DURING SAID ONE TIME FRAME, AND MEANS FOR EXTENDING A CONNECTION THROUGH THE MATRIX BETWEEN SAID MARKED SIDES DURING THE TIME FRAME WHICH IDENTIFIES SAID ONE LINK.
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) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |