US2656421A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wearable hearing aid with inductive pickup for telephone reception
Assignee: E A Myers & Sons Inc
•
Filing: 1950-10-21
•
Granted: 1953-10-20
•
Expires: 1970-10-21
Abstract
No abstract record available.
Inventors
- 👤 Samuel F Lybarger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:10
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/55; H04R25/554; H04R25/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1110228A
Cited
US1458988A
Cited
GB495171A
Cited
US2304339A
Cited
US2417153A
Cited
US2530621A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |