G08B25/00- Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. G08B- SIGNALLING OR CALLING SYSTEMS ORDER TELEGRAPHS ALARM SYSTEMS.230000005540 biological transmission Effects 0.000 description 2.230000003213 activating Effects 0.000 claims description 6.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 US91745297A external-priority Application filed by X 10 Ltd filed Critical X -09-28 Priority to US09/407,217 priority Critical patent/US6310539B1/en Application granted granted Critical Publication of US6310539B1 publication Critical patent/US6310539B1/en Anticipated expiration legal-status Critical Status Expired - Fee Related legal-status Critical Current Links Original Assignee X 10 Ltd 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 or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number US09/407,217 Inventor David Rye George Stevenson Current Assignee (The listed assignees may be inaccurate. Google Patents Panic button security alarm systemÄownload PDF Info Publication number US6310539B1 US6310539B1 US09/407,217 US40721799A US6310539B1 US 6310539 B1 US6310539 B1 US 6310539B1 US 40721799 A US40721799 A US 40721799A US 6310539 B1 US6310539 B1 US 6310539B1 Authority US United States Prior art keywords individual panic button alarm system panic push button Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US6310539B1 - Panic button security alarm system US6310539B1 - Panic button security alarm system
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