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Patent US3069506A successfully refreshed from Google Patents.
US3069506A
Expired / Lapsed
US
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Consonant response in narrow band transmission
Assignee: International Business Machines Corp
•
Filing: 1957-09-04
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Granted: 1962-12-18
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Expires: 1977-09-04
Abstract
No abstract record available.
Inventors
- 👤 Hopner Emil
- 👤 Maxwell C Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:24
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/66
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2576115A
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US2629017A
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US2657253A
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US2779020A
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US2708268A
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US2698379A
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US2810787A
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US2874221A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-17 | 1966-06-18 | 1966-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-17 | 1970-06-18 | 1970-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-17 | 1974-06-18 | 1974-12-18 | $7700.00 | Window Closed / Lapsed |