CA471939A - Systemes de guerites telephoniques - Google Patents

Systemes de guerites telephoniques

Info

Publication number
CA471939A
CA471939A CA471939A CA471939DA CA471939A CA 471939 A CA471939 A CA 471939A CA 471939 A CA471939 A CA 471939A CA 471939D A CA471939D A CA 471939DA CA 471939 A CA471939 A CA 471939A
Authority
CA
Canada
Prior art keywords
telephone call
call box
box systems
systems
telephone
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
CA471939A
Other languages
English (en)
Inventor
Frederick Bates Ernest
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Publication date
Application granted granted Critical
Publication of CA471939A publication Critical patent/CA471939A/fr
Expired legal-status Critical Current

Links

CA471939A Systemes de guerites telephoniques Expired CA471939A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA471939T

Publications (1)

Publication Number Publication Date
CA471939A true CA471939A (fr) 1951-03-06

Family

ID=35605893

Family Applications (1)

Application Number Title Priority Date Filing Date
CA471939A Expired CA471939A (fr) Systemes de guerites telephoniques

Country Status (1)

Country Link
CA (1) CA471939A (fr)

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