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Patent US2948889A successfully refreshed from Google Patents.
US2948889A
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Selective call signal system
Assignee: Telefunken AG
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Filing: 1955-12-20
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Granted: 1960-08-09
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Expires: 1975-12-20
Abstract
No abstract record available.
Inventors
- 👤 Kuehl Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:19
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/18; H04W88/185; H04W88/188
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2489306A
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US1456508A
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US1567223A
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US2116372A
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US2207743A
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FR981512A
Cited
US2483445A
Cited
US2457149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |