US5659602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone apparatus for caller ID
Assignee: Google Technology Holdings LLC
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Filing: 1995-06-20
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Granted: 1997-08-19
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Expires: 2015-06-20
Abstract
Abstract A telephone apparatus for connection to central office equipment to receive a caller ID signal therefrom and having an operating mode in which line current is less than a threshold at which off-hook state is detected, the line current drawn in said mode being sufficient to allow reception and processing of the caller ID signal. In this way, the telephone apparatus can receive and process the caller ID signal, and so can determine whether the call can be accepted, without the central office equipment recognizing the apparatus as having gone off-hook (i.e. having already accepted the call).
Inventors
- 👤 Michael John Gay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:26
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/738; H04M1/57; H04M1/573
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
63 words
A telephone apparatus for connection to central office equipment to receive a caller ID signal therefrom and having an operating mode in which line current is less than a threshold at which off-hook state is detected, the line current drawn in said mode being from an energy in a ring signal and sufficient to allow reception and processing of the caller ID signal.
Claim 2
Dependent Claim
63 words
A telephone apparatus for connection to central office equipment to receive a caller ID signal therefrom and having an operating mode in which line current is less than a threshold at which off-hook state is detected, the line current drawn in said mode being from an energy in a ring signal and sufficient to allow reception and processing of the caller ID signal.
Claim 3
Dependent Claim
19 words
The telephone apparatus of claim 1 wherein in the low current operating mode only reception of calls is possible.
Claim 4
Dependent Claim
49 words
The telephone apparatus of claim 1 wherein the energy from a ring signal is used to pre-charge a capacitor in the telephone apparatus' power supply circuit so that the low current operating mode for receiving and processing the caller ID signal can be active immediately after the ring signal.
References Cited (Backward Citations)
US4242539A
Cited
US4320258A
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US4748664A
Cited
US5117452A
Cited
US5263084A
Cited
US5454031A
Cited
US5546448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-18 | 2001-02-17 | 2001-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-18 | 2005-02-17 | 2005-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-18 | 2009-02-17 | 2009-08-19 | $7700.00 | Window Closed / Lapsed |