US2559902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bias blocking means to cut off amplifier during record changing operation
Assignee: Individual
•
Filing: 1946-09-27
•
Granted: 1951-07-10
•
Expires: 1966-09-27
Abstract
No abstract record available.
Inventors
- 👤 Scott Hermon Hosmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:43
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/02; G11B3/04; G11B3/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1625918A
Cited
GB298277A
Cited
GB298276A
Cited
US1864890A
Cited
US1840660A
Cited
US2012326A
Cited
US1928410A
Cited
US2112699A
Cited
US2214482A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |