Patent US4611413A successfully refreshed from Google Patents.
USRE28097E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time division switching system employing common transmission highways
Assignee: —
•
Filing: 1973-06-11
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Granted: 1974-08-06
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Expires: 1993-06-11
Abstract
Abstract IN A TIME DIVISION SWITCHING SYSTEM, SPEECH SAMPLES FROM A SUBSCRIBER STATION ARE FIRST ENCODED AND THEN STORED, IN DIGITAL CODED FORM IN A REGISTER IN A TRANSCEIVER. THE OUTPUT OF THIS REGISTER IS GTED TO A SECOND REGISTER IN THE COMMON TALKING BUS OR HIGHWAY DURING A FIRST PORTION OF A TIME SLOT, THE SAMPLE FROM THIS REGISTER IN THE COMMON HIGHWAY IS GATED IN A LATER PORTION OF THE SAME TIME SLOT TO A SIMILAR TRANSCEIVER CONNECTED TO THE CALLED SUBSCRIBER. IT IS THEN SUBSEQUENTLY DECODED AND APPLIED TO THE CALLED SUBSCRIBER. TWO-WIRE,FOUR-WIRE, AND CONFERENCING ARRANGEMENTS ARE DISCLOSED.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:37
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04M; H04M3/00; H04M3/42; H04M3/56; H04M3/561
Claims Analysis
Total Claims: 0
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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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |