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CA390992A - Alarm signal system - Google Patents

Alarm signal system

Info

Publication number
CA390992A
CA390992A CA390992A CA390992DA CA390992A CA 390992 A CA390992 A CA 390992A CA 390992 A CA390992 A CA 390992A CA 390992D A CA390992D A CA 390992DA CA 390992 A CA390992 A CA 390992A
Authority
CA
Canada
Prior art keywords
alarm signal
signal system
alarm
signal
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
CA390992A
Other languages
French (fr)
Inventor
Herbert Wheelock John
Scherma Frank
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.)
SIGNAL ENGINEERING AND MANUFACTURING Co
Original Assignee
SIGNAL ENGINEERING AND MANUFACTURING Co
Publication date
Application granted granted Critical
Publication of CA390992A publication Critical patent/CA390992A/en
Expired legal-status Critical Current

Links

CA390992A Alarm signal system Expired CA390992A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA390992T

Publications (1)

Publication Number Publication Date
CA390992A true CA390992A (en) 1940-08-27

Family

ID=35398559

Family Applications (1)

Application Number Title Priority Date Filing Date
CA390992A Expired CA390992A (en) Alarm signal system

Country Status (1)

Country Link
CA (1) CA390992A (en)

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