Patent US3572205A successfully refreshed from Google Patents.
US3572205A
Expired / Lapsed
US
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Harmonic teaching device
Assignee: Individual
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Filing: 1969-07-07
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Granted: 1971-03-23
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Expires: 1989-07-07
Abstract
Abstract A MUSIC TRANSPOSITION AND HARMONIC-PATTERN CONSTRUCTION DEVICE HAVING A PLURALITY OF CONCENTRIC DISKS OF DECREASING RADII WITH THE NOTES OF THE MUSICAL SCALE PRODUCED IN CHROMATIC ORDER AROUND THE PERIPHERY OF EACH DISK. THE NOTES ON EACH DISK MAY BE SEPARATED BY BLANK SPACES. IN USE, THE OPERATOR MAY DIAL A HARMONIC PATTERN FOR ANY MUSICAL KEY AND THE DEVICE WILL SIMULTANEOUSLY PRESENT THE SAME PATTERN FOR ALL OTHER MUSICAL KEYS.
Inventors
- 👤 Lois G Scholfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:40
CPC Classifications
G; G10; G10G; G10G1/00; G10G1/02; G09; G09B; G09B15/00; G09B15/001; G09B15/004; G09B15/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |