CA402413A - Telegraph exchange system - Google Patents

Telegraph exchange system

Info

Publication number
CA402413A
CA402413A CA402413A CA402413DA CA402413A CA 402413 A CA402413 A CA 402413A CA 402413 A CA402413 A CA 402413A CA 402413D A CA402413D A CA 402413DA CA 402413 A CA402413 A CA 402413A
Authority
CA
Canada
Prior art keywords
exchange system
telegraph exchange
telegraph
exchange
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
CA402413A
Other languages
French (fr)
Inventor
Rupert Wheeler Evan
Hoover Ray
Frederick Dirkes 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.)
Western Union Telegraph Co
Original Assignee
Western Union Telegraph Co
Publication date
Application granted granted Critical
Publication of CA402413A publication Critical patent/CA402413A/en
Expired legal-status Critical Current

Links

CA402413A Telegraph exchange system Expired CA402413A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA402413T

Publications (1)

Publication Number Publication Date
CA402413A true CA402413A (en) 1942-01-20

Family

ID=35412859

Family Applications (1)

Application Number Title Priority Date Filing Date
CA402413A Expired CA402413A (en) Telegraph exchange system

Country Status (1)

Country Link
CA (1) CA402413A (en)

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