US1383737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for recording and reproducing sound
Assignee: AT&T Inc
•
Filing: 1918-01-08
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Granted: 1921-07-05
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Expires: 1938-01-08
Abstract
No abstract record available.
Inventors
- 👤 James L Mcquarrie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:00
CPC Classifications
G; G11; G11B; G11B3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1924-07-04 | 1925-01-03 | 1925-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-07-04 | 1929-01-03 | 1929-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-07-04 | 1933-01-03 | 1933-07-05 | $7700.00 | Window Closed / Lapsed |