US3244791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical stringed instrument
Assignee: AMPEG CO Inc
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Filing: 1963-07-09
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Granted: 1966-04-05
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Expires: 1983-07-09
Abstract
No abstract record available.
Inventors
- 👤 Charles E Hull
- 👤 Jespersen Oliver
- 👤 Bloom Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:26
CPC Classifications
G; G10; G10H; G10H3/00; G10H3/12; G10H3/14; G10H3/18; G10H3/185; G10H2220/00; G10H2220/461; G10H2220/465; G10H2220/471; G10H2220/501; G10H2230/00; G10H2230/045; G10H2230/075; G10H2230/111; G10H2230/151
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A STRINGED MUSICAL INSTRUMENT COMPRISING A RIGID BASE MEMBER, MAGNET DIAPHRAGM MEANS INCLUDING A FLEXIBLE, MAGNETIC DIAPHRAGM MEMBER DIRECTLY COUPLED AT ITS EDGES TO THE BASE MEMBER FOR VIBRATION WITH RESPECT THERETO, WHEREBY THE DIAPHRAGM MEMBER FLEXES WITHIN ITS COUPLING POINTS WITH THE RIGID BASE MEMBER, BRIDGE MEANS HELD IN CONTACT WITH THE MAGNETIC DIAPHRAGM MEMBER TO TRANSMIT VIBRATIONS THERETO, AT LEAST ONE VIBRATORY
Claim 2
Dependent Claim
64 words
A STRINGED MUSICAL INSTRUMENT COMPRISING A RIGID BASE MEMBER, MAGNET DIAPHRAGM MEANS INCLUDING A FLEXIBLE, MAGNETIC DIAPHRAGM MEMBER DIRECTLY COUPLED AT ITS EDGES TO THE BASE MEMBER FOR VIBRATION WITH RESPECT THERETO, WHEREBY THE DIAPHRAGM MEMBER FLEXES WITHIN ITS COUPLING POINTS WITH THE RIGID BASE MEMBER, BRIDGE MEANS HELD IN CONTACT WITH THE MAGNETIC DIAPHRAGM MEMBER TO TRANSMIT VIBRATIONS THERETO, AT LEAST ONE VIBRATORY
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) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |