Patent US2497364A successfully refreshed from Google Patents.
US2497364A
Expired / Lapsed
US
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Music chord indicator and transposing device
Assignee: Individual
•
Filing: 1945-02-10
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Granted: 1950-02-14
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Expires: 1965-02-10
Abstract
No abstract record available.
Inventors
- 👤 John H Mayberry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:19
CPC Classifications
G; G10; G10G; G10G1/00; G10G1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE250644C
Cited
US183103A
Cited
US569509A
Cited
US605157A
Cited
GB189811688A
Cited
US718065A
Cited
US1091598A
Cited
US1091865A
Cited
US1236339A
Cited
US2332842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |