Patent US779143A successfully refreshed from Google Patents.
Patent US3357291A successfully refreshed from Google Patents.
US3357291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hi fi amplification of a self-contained amplifier for guitar
Assignee: Individual
•
Filing: 1966-05-25
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Granted: 1967-12-12
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Expires: 1986-05-25
Abstract
No abstract record available.
Inventors
- 👤 Edward W Carmichael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:49
CPC Classifications
G; G10; G10D; G10D1/00; G10D1/04; G10D1/05; G10D1/08; G10D1/085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
THE COMBINATION WITH A LOUD-SPEAKER OF AN AMPLIFIER SYSTEM BUILT INTO THE SOUND BOX OF A CONVENTIONAL GUITAR HAVING A TOP AND A BOTTOM PANEL SPACED BY AN OUTER WALL, A SPEAKER MOUNT COMPRISING; AN APERTURE FORMED IN SUCH TOP PANEL IN A ZONE THEREOF REMOTE FROM THE STRINGS OF THE GUITAR AND HAVING A MARGINAL EDGE SLIGHTLY LARGER THAN THE INNER DIAMETER OF THE OUTER RIM OF SAID SPEAKER AT THE PERIMETER OF THE FLEXURE CONE OF THE SPEAKER, A PLATFORM CONFORMING TO THE CONTOUR OF THE INNERR SURFACE OF SUCH BOTTOM PANEL AND SECURED THERETO OPPOSITE THE APERTURE FORMED IN SUCH TOP PANEL,
Claim 2
Dependent Claim
105 words
THE COMBINATION WITH A LOUD-SPEAKER OF AN AMPLIFIER SYSTEM BUILT INTO THE SOUND BOX OF A CONVENTIONAL GUITAR HAVING A TOP AND A BOTTOM PANEL SPACED BY AN OUTER WALL, A SPEAKER MOUNT COMPRISING; AN APERTURE FORMED IN SUCH TOP PANEL IN A ZONE THEREOF REMOTE FROM THE STRINGS OF THE GUITAR AND HAVING A MARGINAL EDGE SLIGHTLY LARGER THAN THE INNER DIAMETER OF THE OUTER RIM OF SAID SPEAKER AT THE PERIMETER OF THE FLEXURE CONE OF THE SPEAKER, A PLATFORM CONFORMING TO THE CONTOUR OF THE INNERR SURFACE OF SUCH BOTTOM PANEL AND SECURED THERETO OPPOSITE THE APERTURE FORMED IN SUCH TOP PANEL,
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) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |