Patents
Sitemap › G08 - Signalling › G08B - Signalling or calling systems; Order telegraphs; Alarm systems › G08B 13 - Burglar, theft, or intruder alarms
Patents for G08B 13 - Burglar, theft, or intruder alarms (42,025)
05/1978
05/02/1978US4087814 Intruder alarm systems
05/02/1978US4087802 Method and apparatus for electronic surveillance of precisely defined control zone
05/02/1978US4087688 Infrared radiation-burglary detector
04/1978
04/25/1978US4086586 Closed space integrity
04/18/1978US4084519 Anti-burglar window shielding system and latch mechanism therefor
04/11/1978USRE29610 Field strength uniformity control system
04/11/1978US4083321 Anti-pickpocket warning device
03/1978
03/28/1978US4081830 Universal motion and intrusion detection system
03/28/1978US4081680 Infrared radiation-burglary detector
03/28/1978US4081177 Break-away outrigger
03/21/1978US4080629 Camera and housing
03/21/1978US4080594 Doppler shift actuator and intrusion systems
03/14/1978US4079363 Double-detecting loop type alarm system
03/14/1978US4079361 Intrusion sensor and aerial therefor
03/07/1978US4078182 Destructive mechanism for automobile tape decks, radios and the like
02/1978
02/21/1978US4075618 Magnetic asymmetric antipilferage marker
02/21/1978US4075617 Alarm circuit for monitoring removal of plug from electrical power receptacle
02/21/1978US4075616 Detector for alarm system
02/14/1978US4074269 Burglar alarm for use with an automatic garage door opener
02/14/1978US4074249 Magnetic detection means
02/14/1978US4074248 Dual operating control circuits for intrusion detection systems
02/14/1978US4074247 Attack dog security system
02/14/1978US4074246 Contact system for sensing closures
02/07/1978US4072936 Method of and apparatus for detecting damage to a frangible object
02/07/1978US4072933 Fire heat detector and/or burglar alarm
01/1978
01/10/1978US4068222 Circuit arrangement for automatic level control for optical sensors with pulsed radiation, for example for surveillance equipment
01/10/1978US4067289 Portable mechanical alarm for doors, windows and the like
12/1977
12/27/1977US4065791 Interaction of images with strain waves to derive Fourier transform components of the images
12/27/1977US4065762 A.C. bridge intrusion alarm system
12/27/1977US4064825 Alarm device for a campsite
12/20/1977US4064501 Control system
12/20/1977US4064499 Intrusion warning system utilizing an electric field
12/13/1977US4063281 Motion detection employing direct Fourier transforms of images
12/13/1977US4063251 Locker security system
12/13/1977US4063230 Balanced field theft detection system
12/13/1977US4063229 Article surveillance
12/13/1977US4062473 Chemical dispensing anti-burglar booby trap device
12/13/1977US4062314 Magnetically operated warning device
11/1977
11/29/1977US4060803 Security alarm system with audio monitoring capability
11/29/1977US4060040 Antitheft system for sales areas
11/29/1977US4060039 Security system
11/22/1977US4059843 Overload and ground fault protective device
11/22/1977US4059832 Portable intrusion alarm
11/22/1977US4059739 Electrical power receptacle having built-in switching contacts
11/15/1977US4058726 Radiation detector
11/08/1977US4057791 Motion responsive alarm system
11/01/1977US4056815 Battery operated transmitter circuit
10/1977
10/25/1977US4055844 Detection system
10/18/1977US4054867 Detecting damage to bulk material
10/18/1977US4054795 Photoelectric sensing system with light source compensating means
10/18/1977US4054752 Cash register protection recording and alarm system
10/11/1977US4053877 Method of and apparatus for surveying an area
10/04/1977US4052720 Dynamic sound controller and method therefor
10/04/1977US4052718 Enclosure alarm system
10/04/1977US4052716 Fire and intruder detection and alarm apparatus
10/04/1977US4052616 Infrared radiation-burglary detector
10/04/1977US4052120 Optical apparatus for producing a light curtain
09/1977
09/27/1977US4051525 Raisable and lowerable surveillance camera assembly
09/27/1977US4051524 Sequential video switching system
09/27/1977US4050402 Burglar alarm for doors
09/13/1977US4048630 Door operator with automatic control of auxiliary circuit
09/06/1977US4047166 Electrostatically charged cable transducer
09/06/1977US4047107 Pulse width responsive security system
08/1977
08/23/1977US4044251 Electromagnetic radiation detector with large area sensing medium
08/09/1977US4040381 Visual burglar alarm
08/02/1977US4040091 Direct electronic fourier transforms of optical images
08/02/1977US4040045 Method and apparatus for creating and detecting alarm condition using a master antenna television system
08/02/1977US4040044 Dual line electret transducer
07/1977
07/19/1977US4037250 Video switcher
07/19/1977US4037221 Touch controlled switch assembly
07/12/1977US4035798 Ultrasonic intrusion detection system
07/12/1977US4035792 Cash register security system
07/12/1977US4035791 Door alarm controlled by operation of door lock
07/12/1977US4035765 Theft alarm for vehicle carried radio equipment
07/12/1977US4034697 Fire extinguisher cabinet
07/05/1977US4034337 Vehicle alarm apparatus
06/1977
06/28/1977US4032910 Portable
06/28/1977US4032848 Receiver for a coded electronic security system
06/28/1977US4032804 Ultrasensitive differential relay configuration
06/28/1977US4032794 Television locking mechanism
06/14/1977US4030089 Alarm system
06/14/1977US4030087 Anti-theft alarm system
06/14/1977US4030071 Electrically operated locking mechanism
06/07/1977US4028691 Theft deterring apparatus
06/07/1977US4028690 Intruder detection device
06/07/1977US4028567 Electromagnetic vibration-detector device, in particular for anti-theft purposes
05/1977
05/31/1977US4027329 Surveillance system
05/24/1977US4024830 Anti-burglar sound emitting device
05/17/1977US4024526 Alarm device for use in combination with window sash
05/10/1977US4023176 Beacon tracking display system
05/10/1977US4023157 Theft alarm for portable articles
05/10/1977US4023156 Alarm system for detecting disturbance of a solid medium
05/10/1977US4023155 Ultrasonic tape intrusion detection system
05/03/1977US4021807 Beacon tracking system
05/03/1977US4021796 Pushbutton purmutation code control means for a security alarm system
05/03/1977US4021705 Resonant tag circuits having one or more fusible links
05/03/1977US4021679 Method and apparatus for automatic switching
04/1977
04/05/1977US4016553 Article detection system with near field electromagnetic wave control
03/1977
03/29/1977US4015250 Alarm for removal of a fire extinguisher
03/22/1977US4013886 Light projector and detector unit
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