US3608416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tone hole covering assembly for woodwind musical instruments
Assignee: Nippon Gakki Co Ltd
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Filing: 1970-06-22
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Granted: 1971-09-28
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Expires: 1990-06-22
Abstract
Abstract A TONE HOLE COVERING ASSEMBLY FOR A WOODWIND MUSICAL INSTRUMENT COMPRISING A PAD CUP AND AN ENCLOSED, HOLLOW PAD RECEIVED THEREIN, THE PAD BEING FILLED WITH AIR COMPRESSED TO A SUFFICIENT EXTENT TO CAUSE THE OUTER SURFACE OF THE PAD TO CONTACT THE ANNULAR EDGE OF A TONE HOLE OF THE INSTRUMENT IN AN AIRTIGHT MANNER WHEN THE CUP IS OPERATED TO COVER THE TONE HOLE.
Inventors
- 👤 Akira Nagao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:51
CPC Classifications
G; G10; G10D; G10D9/00; G10D9/04; G10D9/047
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |