US2933566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand microphone for sound transducing appliances
Assignee: Individual
•
Filing: 1957-04-30
•
Granted: 1960-04-19
•
Expires: 1977-04-30
Abstract
No abstract record available.
Inventors
- 👤 Muller Willy
- 👤 Holub Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:25
CPC Classifications
H; H01; H01H; H01H25/00; H01H25/002; H03; H03G; H03G1/00; H03G1/02; H04; H04M; H04M1/00; H04M1/02; H04M1/03; H04R; H04R1/00; H04R1/02; H04R1/04; H04R1/08; H04R1/083
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |