Recherche Images Maps Play YouTube Actualités Gmail Drive Plus »
Recherche avancée dans les brevets | Historique Web | Connexion

Brevets

Référencé par

Brevet citant Date de dépôt Date de délivrance Cessionnaire d'origine Titre
US427539024 mars 197723 juin 1981Siemens AktiengesellschaftBurglar alarm device
US433195222 sept. 198025 mai 1982American District Telegraph CompanyRedundant sensor adapter
US443708923 juin 198113 mars 1984S.A. PromocabDual sensitivity intrusion detection system
US457718312 mars 198218 mars 1986Promocab, S.A.Apparatus for the protection of places such as residences
US462519914 janv. 198525 nov. 1986American District Telegraph CompanyCombination intrusion detector system having correlated ultrasonic and microwave detection sub-systems
US47107505 août 19861 déc. 1987C & K Systems, Inc.Fault detecting intrusion detection device
US518101013 févr. 199119 janv. 1993Automotive security system with discrimination between tampering and attack
US533130830 juil. 199219 juil. 1994Napco Security Systems, Inc.Automatically adjustable and self-testing dual technology intrusion detection system for minimizing false alarms
US541648728 juin 199316 mai 1995Scantronic LimitedTesting of dual technology sensors
US54753652 déc. 199412 déc. 1995C & K Systems, Inc.Methods and apparatus for intrusion detection having improved immunity to false alarms
US55812361 juil. 19943 déc. 1996C & K Systems, Inc.Methods and apparatus for intrusion detection having improved immunity to false alarms
US568445826 févr. 19964 nov. 1997Napco Security Systems, Inc.Microwave sensor with adjustable sampling frequency based on environmental conditions
US59863574 févr. 199716 nov. 1999Mytech CorporationOccupancy sensor and method of operating same
US607825315 oct. 199720 juin 2000Mytech CorporationOccupancy sensor and method of operating same
US641520526 août 19992 juil. 2002Mytech CorporationOccupancy sensor and method of operating same
US653857022 juin 200025 mars 2003Honeywell InternationalGlass-break detector and method of alarm discrimination
US76802837 févr. 200516 mars 2010Honeywell International Inc.Method and system for detecting a predetermined sound event such as the sound of breaking glass
US79862284 sept. 200826 juil. 2011Stanley Convergent Security Solutions, Inc.System and method for monitoring security at a premises using line card
USRE3382430 oct. 198918 févr. 1992Fault detecting intrusion detection device