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US2738382A
Expired / Lapsed
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Magnetic drum dial pulse recording and storage registers
Assignee: AT&T Inc
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Filing: 1951-01-27
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Granted: 1956-03-13
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Expires: 1971-01-27
Abstract
No abstract record available.
Inventors
- 👤 Chester E Brooks
- 👤 John H Mcguigan
- 👤 Orlando J Murphy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:02
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2298519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |