US3004104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Identification of sound and like signals
Assignee: MUZAK Corp
•
Filing: 1954-04-29
•
Granted: 1961-10-10
•
Expires: 1974-04-29
Abstract
No abstract record available.
Inventors
- 👤 Hembrooke Emil Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:25
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/00086; G01; G01H; G01H3/00; G11B20/00884; G11B20/00891
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1724938A
Cited
US2116172A
Cited
US2335335A
Cited
US2352918A
Cited
US2398755A
Cited
US2406034A
Cited
US2376275A
Cited
US2580973A
Cited
US2503701A
Cited
US2636936A
Cited
US2474191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-09 | 1965-04-10 | 1965-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-09 | 1969-04-10 | 1969-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-09 | 1973-04-10 | 1973-10-10 | $7700.00 | Window Closed / Lapsed |