CA535581A - Intercommunication telephone systems - Google Patents

Intercommunication telephone systems

Info

Publication number
CA535581A
CA535581A CA535581A CA535581DA CA535581A CA 535581 A CA535581 A CA 535581A CA 535581 A CA535581 A CA 535581A CA 535581D A CA535581D A CA 535581DA CA 535581 A CA535581 A CA 535581A
Authority
CA
Canada
Prior art keywords
telephone systems
intercommunication telephone
intercommunication
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
CA535581A
Other languages
French (fr)
Inventor
Ivens Edgar
G. Wall Harry
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.)
Modern Telephones Great Britain Ltd
Original Assignee
Modern Telephones Great Britain Ltd
Publication date
Application granted granted Critical
Publication of CA535581A publication Critical patent/CA535581A/en
Expired legal-status Critical Current

Links

CA535581A Intercommunication telephone systems Expired CA535581A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA535581T

Publications (1)

Publication Number Publication Date
CA535581A true CA535581A (en) 1957-01-08

Family

ID=35690209

Family Applications (1)

Application Number Title Priority Date Filing Date
CA535581A Expired CA535581A (en) Intercommunication telephone systems

Country Status (1)

Country Link
CA (1) CA535581A (en)

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