CA337722A - Systeme avertisseur telephonique - Google Patents

Systeme avertisseur telephonique

Info

Publication number
CA337722A
CA337722A CA337722A CA337722DA CA337722A CA 337722 A CA337722 A CA 337722A CA 337722 A CA337722 A CA 337722A CA 337722D A CA337722D A CA 337722DA CA 337722 A CA337722 A CA 337722A
Authority
CA
Canada
Prior art keywords
alarm system
telephone alarm
telephone
alarm
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
Application number
CA337722A
Other languages
English (en)
Inventor
Henry Roberts Thomas
Franklin Massonneau Robert
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Publication date
Application granted granted Critical
Publication of CA337722A publication Critical patent/CA337722A/fr
Expired legal-status Critical Current

Links

CA337722A Systeme avertisseur telephonique Expired CA337722A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA337722T

Publications (1)

Publication Number Publication Date
CA337722A true CA337722A (fr) 1933-12-05

Family

ID=35300863

Family Applications (1)

Application Number Title Priority Date Filing Date
CA337722A Expired CA337722A (fr) Systeme avertisseur telephonique

Country Status (1)

Country Link
CA (1) CA337722A (fr)

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