CA538498A - Telephone systems - Google Patents

Telephone systems

Info

Publication number
CA538498A
CA538498A CA538498A CA538498DA CA538498A CA 538498 A CA538498 A CA 538498A CA 538498 A CA538498 A CA 538498A CA 538498D A CA538498D A CA 538498DA CA 538498 A CA538498 A CA 538498A
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
CA538498A
Other languages
French (fr)
Inventor
I. H. Clark Ronald
A. Stallworthy Frank
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 CA538498A publication Critical patent/CA538498A/en
Expired legal-status Critical Current

Links

CA538498A Telephone systems Expired CA538498A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA538498T

Publications (1)

Publication Number Publication Date
CA538498A true CA538498A (en) 1957-03-19

Family

ID=35693137

Family Applications (1)

Application Number Title Priority Date Filing Date
CA538498A Expired CA538498A (en) Telephone systems

Country Status (1)

Country Link
CA (1) CA538498A (en)

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