US4282605B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound reproducing with remote amplifying transducer
Assignee: Bose Corp
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Filing: 1979-10-05
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Granted: 1996-01-23
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Expires: 1999-10-05
Abstract
Abstract A vehicle sound system has a power amplifier integrated with a loudspeaker at each of four remote locations. An LED or diode laser transduces an electrical signal from a tuner or tape player at low level into a corresponding light signal that is transmitted over optical fibers to each remote location to a phototransistor that converts the light signal into a corresponding electrical signal that is amplified by the power amplifier and then reproduced by the loudspeakers. Leads from the vehicle battery carry D.C. power to each location for energizing the power amplifiers and phototransistors.
Inventors
- 👤 Amar G Bose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:26
CPC Classifications
H; H04; H04S; H04S3/00; H04B; H04B10/00; H04B10/25
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) | 1999-01-22 | 1999-07-24 | 2000-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-22 | 2003-07-24 | 2004-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-22 | 2007-07-24 | 2008-01-23 | $7700.00 | Window Closed / Lapsed |