CA1274930A - Systeme personnel d'alarme active sans recours aux mains de l'utilisateur - Google Patents

Systeme personnel d'alarme active sans recours aux mains de l'utilisateur

Info

Publication number
CA1274930A
CA1274930A CA000545221A CA545221A CA1274930A CA 1274930 A CA1274930 A CA 1274930A CA 000545221 A CA000545221 A CA 000545221A CA 545221 A CA545221 A CA 545221A CA 1274930 A CA1274930 A CA 1274930A
Authority
CA
Canada
Prior art keywords
signal
subscriber
speakerphone
telephone
producing
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
CA000545221A
Other languages
English (en)
Inventor
L. Dennis Shapiro
Robert Mason Armington
Theodore Bially
Philip Henry Devlin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lifeline Systems Inc
Original Assignee
Lifeline Systems Inc
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 US06/920,240 external-priority patent/US4760593A/en
Application filed by Lifeline Systems Inc filed Critical Lifeline Systems Inc
Application granted granted Critical
Publication of CA1274930A publication Critical patent/CA1274930A/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

CA000545221A 1986-10-17 1987-08-24 Systeme personnel d'alarme active sans recours aux mains de l'utilisateur Expired - Lifetime CA1274930A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US920,240 1986-10-17
US06/920,240 US4760593A (en) 1985-05-16 1986-10-17 Personal alarm system providing handsfree operation

Publications (1)

Publication Number Publication Date
CA1274930A true CA1274930A (fr) 1990-10-02

Family

ID=25443410

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000545221A Expired - Lifetime CA1274930A (fr) 1986-10-17 1987-08-24 Systeme personnel d'alarme active sans recours aux mains de l'utilisateur

Country Status (1)

Country Link
CA (1) CA1274930A (fr)

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Legal Events

Date Code Title Description
MKEX Expiry