CA677734A - Multiparty telephone signalling system employing transistors - Google Patents

Multiparty telephone signalling system employing transistors

Info

Publication number
CA677734A
CA677734A CA677734A CA677734DA CA677734A CA 677734 A CA677734 A CA 677734A CA 677734 A CA677734 A CA 677734A CA 677734D A CA677734D A CA 677734DA CA 677734 A CA677734 A CA 677734A
Authority
CA
Canada
Prior art keywords
system employing
signalling system
employing transistors
telephone signalling
multiparty 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
CA677734A
Inventor
J. Read Phillip
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.)
Nortel Networks Ltd
Original Assignee
Northern Electric Co Ltd
Publication date
Application granted granted Critical
Publication of CA677734A publication Critical patent/CA677734A/en
Expired legal-status Critical Current

Links

CA677734A Multiparty telephone signalling system employing transistors Expired CA677734A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA677734T

Publications (1)

Publication Number Publication Date
CA677734A true CA677734A (en) 1964-01-07

Family

ID=35978819

Family Applications (1)

Application Number Title Priority Date Filing Date
CA677734A Expired CA677734A (en) Multiparty telephone signalling system employing transistors

Country Status (1)

Country Link
CA (1) CA677734A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3450844A (en) * 1965-11-26 1969-06-17 Suttle Corp Frequency selective control circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3450844A (en) * 1965-11-26 1969-06-17 Suttle Corp Frequency selective control circuit

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