CA1031478A - Circuit d'appel de conference pour systeme de telephones a boutons poussoirs - Google Patents

Circuit d'appel de conference pour systeme de telephones a boutons poussoirs

Info

Publication number
CA1031478A
CA1031478A CA229,312A CA229312A CA1031478A CA 1031478 A CA1031478 A CA 1031478A CA 229312 A CA229312 A CA 229312A CA 1031478 A CA1031478 A CA 1031478A
Authority
CA
Canada
Prior art keywords
telephone system
conference call
key telephone
call circuit
circuit
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
CA229,312A
Other languages
English (en)
Other versions
CA229312S (en
Inventor
Stephen E. Kerman
Tsutomu Kataoka
Tsuyoshi Shinoi
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.)
Nippon Tsushin Kogyo KK
Tie Communications Inc
Original Assignee
Nippon Tsushin Kogyo KK
Tie Communications Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Tsushin Kogyo KK, Tie Communications Inc filed Critical Nippon Tsushin Kogyo KK
Priority to CA229,312A priority Critical patent/CA1031478A/fr
Application granted granted Critical
Publication of CA1031478A publication Critical patent/CA1031478A/fr
Expired legal-status Critical Current

Links

CA229,312A 1975-06-13 1975-06-13 Circuit d'appel de conference pour systeme de telephones a boutons poussoirs Expired CA1031478A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA229,312A CA1031478A (fr) 1975-06-13 1975-06-13 Circuit d'appel de conference pour systeme de telephones a boutons poussoirs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA229,312A CA1031478A (fr) 1975-06-13 1975-06-13 Circuit d'appel de conference pour systeme de telephones a boutons poussoirs

Publications (1)

Publication Number Publication Date
CA1031478A true CA1031478A (fr) 1978-05-16

Family

ID=4103341

Family Applications (1)

Application Number Title Priority Date Filing Date
CA229,312A Expired CA1031478A (fr) 1975-06-13 1975-06-13 Circuit d'appel de conference pour systeme de telephones a boutons poussoirs

Country Status (1)

Country Link
CA (1) CA1031478A (fr)

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