![]() ![]() 238000006011 modification reaction Methods 0.000 description 2.238000009434 installation Methods 0.000 abstract description 8.238000010348 incorporation Methods 0.000 claims description 2.230000005540 biological transmission Effects 0.000 claims description 9.230000000875 corresponding Effects 0.000 claims description 13.239000000463 material Substances 0.000 claims abstract description 9.230000001755 vocal Effects 0.000 claims abstract description 15. ![]() 230000011664 signaling Effects 0.000 claims abstract description 26.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Michael Ord filed Critical Michael Ord Priority to US10633771A priority Critical Application granted granted Critical Publication of US3704845A publication Critical patent/US3704845A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US106337A Inventor Michael Ord Original Assignee Michael Ord Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents Airplane hijacking prevention systemÄownload PDF Info Publication number US3704845A US3704845A US106337A US3704845DA US3704845A US 3704845 A US3704845 A US 3704845A US 106337 A US106337 A US 106337A US 3704845D A US3704845D A US 3704845DA US 3704845 A US3704845 A US 3704845A Authority US United States Prior art keywords cockpit cabin airplane hijacking door Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US3704845A - Airplane hijacking prevention system US3704845A - Airplane hijacking prevention system
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