US3236951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Channel changing equipment for timedivision multiplex communication
Assignee: Fujitsu Ltd
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Filing: 1961-05-08
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Granted: 1966-02-22
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Expires: 1981-05-08
Abstract
No abstract record available.
Inventors
- 👤 Yamamoto Takuma
- 👤 Shimada Ryosaku
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:05
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04J; H04J3/00; H04J3/02; H04J3/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
IN A TIME-DIVISION MULTIPLEX COMMUNICATION SYSTEM, CHANNEL DISTRIBUTING EQUIPMENT COMPRISING A FIRST AND SECOND CHANNEL DISTRIBUTING SYSTEM EACH COMPRISING FIRST AND SECOND TIME DELAY DEVICES EACH HAVING A NUMBER OF INTERMEDIATE TAPS CORRESPONDING TO RESPECTIVELY DIFFERENT DELAY INTERVALS, SAID FIRST TIME DELAY DEVICE HAVING AN INPUT LEAD, SAID SECOND TIME DELAY DEVICE HAVING AN OUTPUT LEAD, A PLURALITY OF SELECTIVELY OPERABLE SWITCH MEANS FORMING A SINGLE MATRIX, EACH TAP ON EACH TIME DELAY DEVICE BEING CONNECTED TO A NUMBER OF SWITCH MEANS CORRESPONDING TO THE NUMBER OF TAPS ON THE OTHER TIME DELAY DEVICE, EACH OF SAID SWITCH MEANS BEING SELECTIVELY OPERABLE TO CONNECT ONE TAP ON ONE TIME DELAY DEVICE WITH ONE TAP ON THE OTHER; MEMORY MEANS FOR STORING INFORMATION CORRESPONDING TO THE DIFFERENCE BETWEEN THE TIME POSITION OF EACH CHANNEL AT THE INPUT LEAD OF THE FIRST
Claim 2
Dependent Claim
140 words
IN A TIME-DIVISION MULTIPLEX COMMUNICATION SYSTEM, CHANNEL DISTRIBUTING EQUIPMENT COMPRISING A FIRST AND SECOND CHANNEL DISTRIBUTING SYSTEM EACH COMPRISING FIRST AND SECOND TIME DELAY DEVICES EACH HAVING A NUMBER OF INTERMEDIATE TAPS CORRESPONDING TO RESPECTIVELY DIFFERENT DELAY INTERVALS, SAID FIRST TIME DELAY DEVICE HAVING AN INPUT LEAD, SAID SECOND TIME DELAY DEVICE HAVING AN OUTPUT LEAD, A PLURALITY OF SELECTIVELY OPERABLE SWITCH MEANS FORMING A SINGLE MATRIX, EACH TAP ON EACH TIME DELAY DEVICE BEING CONNECTED TO A NUMBER OF SWITCH MEANS CORRESPONDING TO THE NUMBER OF TAPS ON THE OTHER TIME DELAY DEVICE, EACH OF SAID SWITCH MEANS BEING SELECTIVELY OPERABLE TO CONNECT ONE TAP ON ONE TIME DELAY DEVICE WITH ONE TAP ON THE OTHER; MEMORY MEANS FOR STORING INFORMATION CORRESPONDING TO THE DIFFERENCE BETWEEN THE TIME POSITION OF EACH CHANNEL AT THE INPUT LEAD OF THE FIRST
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |