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US2549688A
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US
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Magneto party-line adapter
Assignee: Automatic Electric Laboratories Inc
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Filing: 1947-10-18
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Granted: 1951-04-17
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Expires: 1967-10-18
Abstract
No abstract record available.
Inventors
- 👤 Roy W Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:46
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/60; H04Q; H04Q3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1646421A
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US1685547A
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US1827061A
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US1765619A
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US1851385A
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US1942404A
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US2139247A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |