US3520982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and a device for generating an equal-tempered tone scale in musical instruments
Assignee: US Philips Corp
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Filing: 1967-06-29
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Granted: 1970-07-21
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Expires: 1987-06-29
Abstract
No abstract record available.
Inventors
- 👤 Karl G Malmfors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:10
CPC Classifications
G; G10; G10H; G10H5/00; G10H5/02; G10H5/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |