IL83404A0IL83404AIL8340487AIL83404A0IL 83404 A0IL83404 A0IL 83404A0IL 83404 AIL83404 AIL 83404AIL 8340487 AIL8340487 AIL 8340487AIL 83404 A0IL83404 A0IL 83404A0
Authority
IL
Israel
Prior art keywords
siren
improved
improved siren
Prior art date
Application number
IL83404A
Original Assignee
Southern California Edison Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US06/480,851external-prioritypatent/US4558656A/en
Application filed by Southern California Edison CofiledCriticalSouthern California Edison Co
Priority to IL83404ApriorityCriticalpatent/IL83404A0/en
Publication of IL83404A0publicationCriticalpatent/IL83404A0/en