CA507617A - Telephone systems - Google Patents

Telephone systems

Info

Publication number
CA507617A
CA507617A CA507617A CA507617DA CA507617A CA 507617 A CA507617 A CA 507617A CA 507617 A CA507617 A CA 507617A CA 507617D A CA507617D A CA 507617DA CA 507617 A CA507617 A CA 507617A
Authority
CA
Canada
Prior art keywords
telephone systems
telephone
systems
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
CA507617A
Other languages
French (fr)
Inventor
E. Humphries Horace
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.)
Siemens Brothers and Co Ltd
Original Assignee
Siemens Brothers and Co Ltd
Publication date
Application granted granted Critical
Publication of CA507617A publication Critical patent/CA507617A/en
Expired legal-status Critical Current

Links

CA507617A Telephone systems Expired CA507617A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA507617T

Publications (1)

Publication Number Publication Date
CA507617A true CA507617A (en) 1954-11-23

Family

ID=35653561

Family Applications (1)

Application Number Title Priority Date Filing Date
CA507617A Expired CA507617A (en) Telephone systems

Country Status (1)

Country Link
CA (1) CA507617A (en)

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