Patent US4112809A successfully refreshed from Google Patents.
US4112809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stringed instrument for play training
Assignee: MUSIKINDUSTRIELL FORSKNING MIFO AB
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Filing: 1976-07-09
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Granted: 1978-09-12
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Expires: 1996-07-09
Abstract
Abstract A stringed instrument for training purposes resembles the usual instrument but comprises a body of sound-damping material which replaces the resonance-box to reduce exterior sound, the sound of the strings being transmitted to the ears of the user by a listening device.
Inventors
- 👤 Gunnar Sjostrand
- 👤 Staffan Sjostrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:25
CPC Classifications
G; G10; G10D; G10D3/00; G10D3/02; G10D1/00; G10D1/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
Training instrument for practicing the playing of a stringed instrument comprising the neck and grip-board of a stringed instrument for a set of strings to be attached at one of their ends to said neck, a plate attached to said grip-board to support the other ends of said strings, a structure to simulate a resonance-box comprising a body of sound-damping material to minimize the exterior dispersion of sounds produced by the strings, and acoustic sound pickup means attached to said plate within said structure to transmit sounds from the strings to the user of the instrument.
Claim 2
Dependent Claim
96 words
Training instrument for practicing the playing of a stringed instrument comprising the neck and grip-board of a stringed instrument for a set of strings to be attached at one of their ends to said neck, a plate attached to said grip-board to support the other ends of said strings, a structure to simulate a resonance-box comprising a body of sound-damping material to minimize the exterior dispersion of sounds produced by the strings, and acoustic sound pickup means attached to said plate within said structure to transmit sounds from the strings to the user of the instrument.
Claim 3
Dependent Claim
29 words
Training instrument according to claim 1, wherein said pickup means is acoustic and includes a pair of tubes for acoustically transmitting said sounds to the ears of the user.
Claim 4
Dependent Claim
17 words
Training instrument according to claim 1, wherein said strings are supported on said instrument with sound-damping material.
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) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |