US3636809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stringed musical instrument
Assignee: Nippon Gakki Co Ltd
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Filing: 1970-07-07
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Granted: 1972-01-25
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Expires: 1990-07-07
Abstract
Abstract A stringed musical instrument comprises one sound box having two sound boards each provided with a sound hole and a sidewall joining the sound boards, two necks provided for the sound boards respectively, two heads connected to the necks, two seal caps for closing the sound holes, and strings stretched between the heads and the sound boards, whereby musical tones having a variety of tone colors can be produced on both sides of the sound box.
Inventors
- 👤 Hideyuki Ezaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:30
CPC Classifications
G; G10; G10D; G10D1/00; G10D1/04; G10D1/05; G10D1/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
137 words
A stringed musical instrument comprising a hollow sound box formed of two sound boards each having a sound hole therein, said sound boards being disposed at a predetermined space in substantially parallel relationship, and a sidewall fixedly coupling said sound boards, said sound boards and sidewall defining a sound chamber common to both of said sound boards; seal caps detachably attached to said sound boards, each of said seal caps closing said sound hole; two necks extending from the predetermined parts of the sidewall with their outer surfaces substantially flush with those of both sound boards respectively; a head connected to each of said necks; finger boards fixed at least on said surfaces of the necks and provided with a plurality of frets thereon; and a plurality of strings stretched between said heads and said sound boards.
Claim 2
Dependent Claim
137 words
A stringed musical instrument comprising a hollow sound box formed of two sound boards each having a sound hole therein, said sound boards being disposed at a predetermined space in substantially parallel relationship, and a sidewall fixedly coupling said sound boards, said sound boards and sidewall defining a sound chamber common to both of said sound boards; seal caps detachably attached to said sound boards, each of said seal caps closing said sound hole; two necks extending from the predetermined parts of the sidewall with their outer surfaces substantially flush with those of both sound boards respectively; a head connected to each of said necks; finger boards fixed at least on said surfaces of the necks and provided with a plurality of frets thereon; and a plurality of strings stretched between said heads and said sound boards.
Claim 3
Dependent Claim
30 words
The stringed musical instrument according to claim 1 wherein said necks extend in the same direction in spaced parallel relation to one another and each neck terminates in a head.
Claim 4
Dependent Claim
35 words
The stringed musical instrument according to claim 1 wherein said necks extend substantially in the same direction in a parallel relationship with their rear sides facing each other and said heads are fixedly connected together.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |