US Patent No: 4,673,914

Number of patents in Portfolio can not be more than 2000

Keyless automobile door lock/unlock, ignition switching and burglar alarm system

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Importance

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Abstract

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The system is an electric control circuit and associated components including a door locking circuit and an ignition circuit. The ignition circuit is connected to the vehicle battery power through a latch circuit. The latch circuit has alternative 'lock' and 'unlock' modes for, respectively, connecting battery power to and disconnecting battery power from the ignition circuit. A code sensing circuit provides switching for the latch circuit. This circuit includes means for programming a preselected unlocking code. The code sensing circuit includes code inputting means which might be a push button pad, a barcode reader, an optical binary-code reader, or a magnetic reader; the inputting means being mounted on an entry door of the vehicle. The code sensing circuit includes comparator means for comparing the inputted code to the preprogrammed code for the sending of an unlocking signal to the latch circuit. The control circuit includes an alarm circuit, effective in the 'lock' mode of the latch circuit to effect the sounding of the vehicle warning horns when battery power is connected to the motor ignition coil by external means. The ignition circuit includes manual switches for engine starting and stopping and for power to accessories. The locking circuit includes interior switches for selectively locking and unlocking entry doors and the trunk lid.

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First Claim

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Patent Owner(s)

  • Assignment data not available. Check USPTO

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lee, Ki-Chang 125-6 Jongam-dong, Sungbuk-ku, Seoul 132, KR 6 30

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Beard; George W. (1)
4,327,353 Security system 46 1980
 
CLIFFORD ELECTRONICS, INC. (1)
4,233,642 Safety interlock system 13 1979
 
FORD MOTOR COMPANY (1)
4,205,325 Keyless entry system 123 1977
 
Jenkins; O. C. (1)
4,371,052 Anti-theft device for motor vehicles 9 1980
 
Keycon Corporation (1)
4,240,516 Vehicle securing and lockout prevention system 48 1979
 
NISSAN MOTOR CO., LTD. (1)
4,446,380 Keyless device actuating system for an automotive vehicle 68 1982
 
NUTEK CORPORATION (1)
4,463,340 Anti-theft control system 66 1981
 
Roman Industries, Inc. (1)
4,320,382 Automotive alarm 14 1980
 
Sachs-Systemtechnik GmbH (1)
4,274,080 Magnetic security system 14 1979
 
Other [Check patent profile for assignment information] (2)
4,280,119 Ultrasonic and capacitive electronic key systems 14 1979
4,438,752 Vehicle ignition system 12 1981

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
TOYOTA MOTOR CORPORATION (4)
8,329,247 Methods for producing omni-directional multi-layer photonic structures 0 2009
8,593,728 Multilayer photonic structures 0 2010
8,257,784 Methods for identifying articles of manufacture 0 2010
8,196,823 Optical lock systems and methods 0 2010
 
ENTERPRISE ELECTRONICS LLC (2)
6,617,975 Keyless entry system for vehicles in particular 31 1999
7,106,171 Keyless command system for vehicles and other applications 28 2000
 
SAFETYSTREAM MOBILE LIMITED (2)
7,920,048 Method for using a table of data to control access and a locking mechanism using same 0 2006
8,248,207 Method for using a table of data to control access to a secure container 0 2011
 
AISIN SEIKI KABUSHIKI KAISHA (1)
4,926,332 Locking device for vehicles 54 1988
 
ALETHO RESEARCH CORPORATION (1)
5,023,591 Anti-theft control apparatus 23 1989
 
ALPINE ELECTRONICS, INC. (1)
5,790,015 Security apparatus 16 1995
 
CATERPILLAR INC. (1)
6,060,981 Vehicle security system for unattended idle operations 28 1999
 
HITACHI, LTD. (1)
4,982,072 Driver license check system with IC card and method therefor 40 1988
 
HONDA MOTOR CO., LTD. (1)
7,501,931 Vehicular remote locking and unlocking control apparatus 1 2005
 
LEAR CORPORATION EEDS AND INTERIORS (1)
5,745,045 Optical anti-theft system 5 1995
 
MIWA LOCK CO., LTD. (1)
5,508,693 Burglarproof system for automotive vehicle 3 1994
 
Myers Holdings Pty. Ltd. (1)
5,103,932 Security system for an environment 3 1990
 
PITNEY BOWES INC. (1)
7,357,296 Method and system for decontaminating mail 0 2001
 
Saturn Corporation (1)
4,926,959 Operator control for vehicle components 0 1989
 
SIEMENS VDO AUTOMOTIVE CORPORATION (1)
6,653,747 Electronic key system including ignition and transmission control 5 2000
 
VOLVO CAR CORPORATION (1)
6,672,421 Motor vehicle arrangement 3 2001
 
Other [Check patent profile for assignment information] (5)
4,832,146 Anti-theft battery 9 1987
4,908,608 Alarmcard 15 1988
5,006,843 Security module to preclude unauthorized users to operate motor driven equipment and to protect valuable parts of the motor from unauthorized exchange 63 1990
5,543,665 Optical key and lock code authentication 11 1994
6,353,383 Alarm apparatus for monitoring activity in a vehicle 7 2000