US2463786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic mechanism for bone conduction receivers, etc.
Assignee: E A Myers & Sons
•
Filing: 1947-02-10
•
Granted: 1949-03-08
•
Expires: 1967-02-10
Abstract
No abstract record available.
Inventors
- 👤 Samuel F Lybarger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:49
CPC Classifications
H; H04; H04R; H04R11/00; H04R11/02; H04R25/00; H04R25/60; H04R25/604; H04R25/606; H04R2460/00; H04R2460/13
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) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |