US3012105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for mixing and recording multiple sound signals
Assignee: BERNDT BACH Inc
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Filing: 1955-10-17
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Granted: 1961-12-05
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Expires: 1975-10-17
Abstract
No abstract record available.
Inventors
- 👤 Walter H Bach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:22
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/54; G11B27/00; G11B27/02; G11B27/022; G11B27/029; G11B27/36
Claims Analysis
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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) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |