Patent US5217471A successfully refreshed from Google Patents.
Patent US2564861A successfully refreshed from Google Patents.
US2945307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Talking book having magnetic recording means and shielding means therefor
Assignee: Individual
•
Filing: 1955-10-31
•
Granted: 1960-07-19
•
Expires: 1975-10-31
Abstract
No abstract record available.
Inventors
- 👤 Heinz E Kallmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:42
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/06; G09B5/062
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1502312A
Cited
US1653467A
Cited
US1679708A
Cited
US2369572A
Cited
US2546680A
Cited
US2550803A
Cited
US2516579A
Cited
US2603006A
Cited
US2548011A
Cited
US2743317A
Cited
US2677200A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |