Patent US2748201A successfully refreshed from Google Patents.
US2748201A
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Multiple-feedback systems
Assignee: AT&T Inc
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Filing: 1951-09-21
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Granted: 1956-05-29
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Expires: 1971-09-21
Abstract
No abstract record available.
Inventors
- 👤 Mcmillan Brockway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:41
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/34; H03F1/36; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/06; H04B3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2210503A
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FR863192A
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US2281238A
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US2379513A
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US2370483A
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US2624796A
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US2536651A
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US2479772A
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US2547662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |