Patent US5736962A successfully refreshed from Google Patents.
US5736962A
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Time since last fix annunciation system for GPS-based wireless rescue system
Assignee: Tendler Cellular Inc
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Filing: 1996-02-28
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Granted: 1998-04-07
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Expires: 2016-02-28
Abstract
Abstract In a wireless emergency location system in which a cellular phone is utilized to communicate the location of an individual or vehicle by announcing position based on the output of a GPS receiver, time since last fix is computed and annunciated to permit emergency personnel to ascertain if the position information is valid. In a one embodiment, velocity and direction of travel are also annunciated for permitting emergency personnel to calculate the location of the phone and thus a stricken individual. Time since last fix as well as velocity and direction annunciation is also used to enable location of stolen or hijacked vehicles assuming location information is no longer available at the phone or satellite fix has been lost.
Inventors
- 👤 Robert K. Tendler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:56
CPC Classifications
G; G01; G01S; G01S19/00; G01S19/01; G01S19/13; G01S19/14; G01S19/17; G01S5/00; G01S5/0009; G01S5/0018; G01S5/0027; G01S2205/00; G01S2205/001; G01S2205/006; G01S2205/008
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
120 words
In a wireless location system in which a wireless phone is provided with a GPS receiver for receiving GPS satellite signals and means for annunciating the position derived from said GPS receiver and for transmitting said annunciated position to a remote location by said wireless phone, means at said wireless phone for ascertaining when in time said GPS receiver acquires a position fix from said GPS satellites, means for ascertaining present time, means for calculating time since said fix, means for annunciating said time since said fix, and means for transmitting said annunciated time since said fix to said remote location with said position annunciation such that the validity of said annunciated position can be ascertained at said remote location.
Claim 2
Dependent Claim
120 words
In a wireless location system in which a wireless phone is provided with a GPS receiver for receiving GPS satellite signals and means for annunciating the position derived from said GPS receiver and for transmitting said annunciated position to a remote location by said wireless phone, means at said wireless phone for ascertaining when in time said GPS receiver acquires a position fix from said GPS satellites, means for ascertaining present time, means for calculating time since said fix, means for annunciating said time since said fix, and means for transmitting said annunciated time since said fix to said remote location with said position annunciation such that the validity of said annunciated position can be ascertained at said remote location.
Claim 3
Dependent Claim
20 words
The system of claim 1 wherein said fix is the last fix prior to the transmitting of said annunciated position.
Claim 4
Dependent Claim
31 words
The system of claim 1 wherein said means for annunciating position includes means for announcing the fact of an emergency, whereby said wireless location system is a wireless emergency location system.
Claim 5
Dependent Claim
26 words
The system of claim 1 wherein said means for announcing a request for services, whereby the requested services may be reliable provided to the appropriate location.
Claim 6
Dependent Claim
15 words
The system of claim 1 wherein said means or annunciating position includes a speech synthesizer.
Claim 7
Dependent Claim
26 words
The system of claim 1 wherein said GPS receiver outputs velocity of said GPS receiver and wherein said means for annunciating position also annunciates said velocity.
Claim 8
Dependent Claim
30 words
The system of claim 1 wherein said GPS receiver outputs direction of travel of said GPS receiver and wherein said means for annunciating position also annunciates said direction of travel.
References Cited (Backward Citations)
US5432841A
Cited
US5355140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-04-06 | 2001-10-06 | 2002-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-06 | 2005-10-06 | 2006-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-06 | 2009-10-06 | 2010-04-07 | $7700.00 | Window Closed / Lapsed |