CA554232A - Primary-secondary-spread crossbar telephone system - Google Patents

Primary-secondary-spread crossbar telephone system

Info

Publication number
CA554232A
CA554232A CA554232A CA554232DA CA554232A CA 554232 A CA554232 A CA 554232A CA 554232 A CA554232 A CA 554232A CA 554232D A CA554232D A CA 554232DA CA 554232 A CA554232 A CA 554232A
Authority
CA
Canada
Prior art keywords
spread
primary
telephone system
crossbar telephone
crossbar
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
CA554232A
Other languages
French (fr)
Inventor
I. Bellamy John
L. Bowser Theron
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Publication date
Application granted granted Critical
Publication of CA554232A publication Critical patent/CA554232A/en
Expired legal-status Critical Current

Links

CA554232A Primary-secondary-spread crossbar telephone system Expired CA554232A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA554232T

Publications (1)

Publication Number Publication Date
CA554232A true CA554232A (en) 1958-03-11

Family

ID=35715638

Family Applications (1)

Application Number Title Priority Date Filing Date
CA554232A Expired CA554232A (en) Primary-secondary-spread crossbar telephone system

Country Status (1)

Country Link
CA (1) CA554232A (en)

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