US3394625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Music education device with tone generators corresponding to notes on a staff
Assignee: Individual
•
Filing: 1966-05-31
•
Granted: 1968-07-30
•
Expires: 1986-05-31
Abstract
No abstract record available.
Inventors
- 👤 Harlow B Grow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:10
CPC Classifications
G; G09; G09B; G09B15/00; G09B15/02; G09B15/04; Y; Y10; Y10S; Y10S84/00; Y10S84/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US138714A
Cited
US159218A
Cited
US672678A
Cited
US912385A
Cited
US1754459A
Cited
US1821311A
Cited
US2879685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |