CA819814A - Switch board for an interphone communication system - Google Patents

Switch board for an interphone communication system

Info

Publication number
CA819814A
CA819814A CA819814A CA819814DA CA819814A CA 819814 A CA819814 A CA 819814A CA 819814 A CA819814 A CA 819814A CA 819814D A CA819814D A CA 819814DA CA 819814 A CA819814 A CA 819814A
Authority
CA
Canada
Prior art keywords
communication system
switch board
interphone communication
interphone
board
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
CA819814A
Inventor
R. De Graaf Nicolaas
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.)
Nv Nira
Original Assignee
Nv Nira
Publication date
Application granted granted Critical
Publication of CA819814A publication Critical patent/CA819814A/en
Expired legal-status Critical Current

Links

CA819814A Switch board for an interphone communication system Expired CA819814A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA819814T

Publications (1)

Publication Number Publication Date
CA819814A true CA819814A (en) 1969-08-05

Family

ID=36292381

Family Applications (1)

Application Number Title Priority Date Filing Date
CA819814A Expired CA819814A (en) Switch board for an interphone communication system

Country Status (1)

Country Link
CA (1) CA819814A (en)

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