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US2981844A
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US
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Analog-to-digital encoder
Assignee: BALDWIN PIANO Co
•
Filing: 1955-12-20
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Granted: 1961-04-25
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Expires: 1975-12-20
Abstract
No abstract record available.
Inventors
- 👤 Errett C Broxon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:19
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/22; H03M1/24; H03M1/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1453366A
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US1824604A
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US1997903A
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US2131028A
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US2714204A
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US2747797A
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US2765459A
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US2749538A
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US2754502A
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US2859432A
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US2860326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |