US5664012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hands free device for a portable phone
Assignee: E Lead Electronic Co Ltd
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Filing: 1995-11-06
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Granted: 1997-09-02
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Expires: 2015-11-06
Abstract
Abstract A portable hold-free device is set forth for a hand phone, including an interface board and an external wire set. The interface board is sandwiched between a hand phone and a battery. A hold-free circuit set is contained in the interface board and connected to the external wire set. The external wire set includes an earphone and a microphone. The hold-free device enables the hand phone to be used without being held during driving a car, riding a motorcycle or a bicycle, walking or in other conditions in which the user is inconvenient to hold the hand phone. A speech memory IC is added to the interface board to serve as an answering machine.
Inventors
- 👤 Stephen Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:43
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/60; H04M1/6033; H04M1/6041; H04M1/6075; H04B; H04B1/00; H04B1/38; H04B1/3827; H04B1/385; H04B2001/3855; H04B2001/3866; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
86 words
A portable hold-free device for a hand phone, comprising an interface board and an external wire set connected thereto, a hold-free circuit set being contained in the interface board, the external wire set including an earphone and a microphone, said interface board being substantially entirely sandwiched between a battery and a hand phone, and said interface board having a front mating face mating to a back mating face of the hand phone and a back mating face mating to a front mating face of the battery.
Claim 2
Dependent Claim
86 words
A portable hold-free device for a hand phone, comprising an interface board and an external wire set connected thereto, a hold-free circuit set being contained in the interface board, the external wire set including an earphone and a microphone, said interface board being substantially entirely sandwiched between a battery and a hand phone, and said interface board having a front mating face mating to a back mating face of the hand phone and a back mating face mating to a front mating face of the battery.
Claim 3
Dependent Claim
40 words
A hold-free device as claim in claim 1, wherein the interface board is disposed with an external wire with a plug which is inserted into a signal transmitting socket of the interface board so as to transmit a peripheral signal.
Claim 4
Dependent Claim
31 words
A hold-free device as claimed in claim 1, wherein the hold-free circuit set of the interface board comprises a speaker amplifying circuit, a microphone amplifying circuit and a bold-free triggering circuit.
Claim 5
Dependent Claim
71 words
A hold-free device as claimed in claim 1, wherein the hold-free circuit set of the interface board comprises a power-saving circuit which utilizes a difference between a high load of the hand phone when the hand phone is connected to the interface boadr and a low load of the hand phone when the hand phone is disconnected from the interface board to activate the hold-free circuit so as to save power.
Claim 6
Dependent Claim
27 words
A hold-free device as claimed in claim 1, wherein the hold-free circuit set of the interface board comprises a speech memory IC serving as an answering machine.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-09-01 | 2001-03-03 | 2001-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-01 | 2005-03-03 | 2005-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-01 | 2009-03-03 | 2009-09-02 | $7700.00 | Window Closed / Lapsed |