CA790684A - Electrical signalling systems - Google Patents

Electrical signalling systems

Info

Publication number
CA790684A
CA790684A CA790684A CA790684DA CA790684A CA 790684 A CA790684 A CA 790684A CA 790684 A CA790684 A CA 790684A CA 790684D A CA790684D A CA 790684DA CA 790684 A CA790684 A CA 790684A
Authority
CA
Canada
Prior art keywords
signalling systems
electrical signalling
electrical
systems
signalling
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
CA790684A
Inventor
F. Purton Raymond
F. Croft Geoffrey
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
Publication date
Application granted granted Critical
Publication of CA790684A publication Critical patent/CA790684A/en
Expired legal-status Critical Current

Links

CA790684A Electrical signalling systems Expired CA790684A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA790684T

Publications (1)

Publication Number Publication Date
CA790684A true CA790684A (en) 1968-07-23

Family

ID=36254658

Family Applications (1)

Application Number Title Priority Date Filing Date
CA790684A Expired CA790684A (en) Electrical signalling systems

Country Status (1)

Country Link
CA (1) CA790684A (en)

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