US3548334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise reduction circuit and system
Assignee: Panasonic Holdings Corp
•
Filing: 1969-07-28
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Granted: 1970-12-15
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Expires: 1989-07-28
Abstract
No abstract record available.
Inventors
- 👤 Masao Tomita
- 👤 Tetsuo Hino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:17
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/26; H03F3/00; H03F3/181; H03F3/183; H03G; H03G9/00; H03G9/02; H03G9/025
Claims Analysis
Total Claims: 0
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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) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |