US5225713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile security system
Assignee: Individual
•
Filing: 1991-06-25
•
Granted: 1993-07-06
•
Expires: 2011-06-25
Abstract
Abstract An apparatus is provided for preventing unauthorized operation of an engine of a motorized vehicle having a cellular telephone whereby certain DTMF tones must be generated on the cellular telephone prior to the engine of a motor vehicle being operational.
Inventors
- 👤 Warren J. Henneberry
- 👤 Stewart Settles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:26
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/20; B60R25/23; B60R25/01; B60R25/04; B60R25/10; B60R25/1003
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
141 words
In a motorized vehicle having an electric energy supply means, a starter circuit and an ignition circuit, the improvement comprising: a cellular telephone which produces DTMF tones generated for dialing in the land-based telephone network; a control circuit activated by closing of either the starter circuit or the ignition circuit electrically connected by wire to the speaker of the telephone having circuitry for monitoring the DTMF tones generated by the telephone and for decoding previously stored DTMF tones for opening and closing a circuit; means for selecting the circuit to be controlled by the control circuit; and an alarm circuit activated by closing of either the starter circuit or the ignition circuit electrically connected by wire to the telephone and to the control circuit for activating an alarm upon entry of an incorrect code or severing or removal of the telephone.
Claim 2
Dependent Claim
141 words
In a motorized vehicle having an electric energy supply means, a starter circuit and an ignition circuit, the improvement comprising: a cellular telephone which produces DTMF tones generated for dialing in the land-based telephone network; a control circuit activated by closing of either the starter circuit or the ignition circuit electrically connected by wire to the speaker of the telephone having circuitry for monitoring the DTMF tones generated by the telephone and for decoding previously stored DTMF tones for opening and closing a circuit; means for selecting the circuit to be controlled by the control circuit; and an alarm circuit activated by closing of either the starter circuit or the ignition circuit electrically connected by wire to the telephone and to the control circuit for activating an alarm upon entry of an incorrect code or severing or removal of the telephone.
Claim 3
Dependent Claim
30 words
The improvement according to claim 1 which further includes means for a timed delay after the ignition circuit or the starter circuit is opened before the control circuit is reactivated.
References Cited (Backward Citations)
US4023138A
Cited
US4413261A
Cited
US4507644A
Cited
US4809199A
Cited
US5113427A
Cited
US5000139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-05 | 1997-01-04 | 1997-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-05 | 2001-01-04 | 2001-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-05 | 2005-01-04 | 2005-07-06 | $7700.00 | Window Closed / Lapsed |