Patent US4563674A successfully refreshed from Google Patents.
Patent US2926267A successfully refreshed from Google Patents.
US2926267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct-current transistor switching amplifier circuit
Assignee: TDK Micronas GmbH
•
Filing: 1955-03-10
•
Granted: 1960-02-23
•
Expires: 1975-03-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Arthur J Radcliffe
- 👤 Arthur R Denz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:45
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/20; H04L25/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2535377A
Cited
US2605359A
Cited
US2595496A
Cited
US2597796A
Cited
US2666150A
Cited
US2663806A
Cited
US2655609A
Cited
US2655608A
Cited
US2728857A
Cited
US2718613A
Cited
US2812474A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |