US2949539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical encoder
Assignee: BALDWIN PIANO Co
•
Filing: 1956-11-21
•
Granted: 1960-08-16
•
Expires: 1976-11-21
Abstract
No abstract record available.
Inventors
- 👤 Wilfred K Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:45
CPC Classifications
H; H03; H03M; H03M1/00; H03M1/12; H03M1/22; H03M1/24; H03M1/28; H03M1/287; Y; Y10; Y10S; Y10S177/00; Y10S177/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB191417131A
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US1802803A
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US1998461A
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US1886188A
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US2169842A
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US2402662A
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US2582850A
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US2688564A
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US2796534A
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US2789193A
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US2745021A
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US2779811A
Cited
FR1065332A
Cited
US2831634A
Cited
US2728835A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |