CA21862A - Non-interfering fire-alarm telegraph system - Google Patents

Non-interfering fire-alarm telegraph system

Info

Publication number
CA21862A
CA21862A CA000021862A CA21862DA CA21862A CA 21862 A CA21862 A CA 21862A CA 000021862 A CA000021862 A CA 000021862A CA 21862D A CA21862D A CA 21862DA CA 21862 A CA21862 A CA 21862A
Authority
CA
Canada
Prior art keywords
telegraph system
alarm telegraph
interfering
fire
interfering fire
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
CA000021862A
Other languages
French (fr)
Inventor
Lewis H. Mccullough
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.)
Individual
Original Assignee
Individual
Publication date
Application granted granted Critical
Publication of CA21862A publication Critical patent/CA21862A/en
Expired legal-status Critical Current

Links

CA000021862A Non-interfering fire-alarm telegraph system Expired CA21862A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA21862T

Publications (1)

Publication Number Publication Date
CA21862A true CA21862A (en) 1885-06-12

Family

ID=45138405

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000021862A Expired CA21862A (en) Non-interfering fire-alarm telegraph system

Country Status (1)

Country Link
CA (1) CA21862A (en)

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