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AU490662B2 - Improvements in pushbutton calling circuits for telephone sets - Google Patents

Improvements in pushbutton calling circuits for telephone sets

Info

Publication number
AU490662B2
AU490662B2 AU71770/74A AU7177074A AU490662B2 AU 490662 B2 AU490662 B2 AU 490662B2 AU 71770/74 A AU71770/74 A AU 71770/74A AU 7177074 A AU7177074 A AU 7177074A AU 490662 B2 AU490662 B2 AU 490662B2
Authority
AU
Australia
Prior art keywords
telephone sets
calling circuits
pushbutton
pushbutton calling
circuits
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
AU71770/74A
Other versions
AU7177074A (en
Inventor
Antonio Maestre Jimenez Jose
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
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
Priority claimed from ES417537A external-priority patent/ES417537A1/en
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of AU490662B2 publication Critical patent/AU490662B2/en
Publication of AU7177074A publication Critical patent/AU7177074A/en
Expired legal-status Critical Current

Links

AU71770/74A 1973-08-03 1974-07-29 Improvements in pushbutton calling circuits for telephone sets Expired AU490662B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES417537A ES417537A1 (en) 1973-08-03 1973-08-03 Push-button calling circuits for telephone sets
ESES417537 1973-08-03

Publications (2)

Publication Number Publication Date
AU490662B2 true AU490662B2 (en) 1976-01-29
AU7177074A AU7177074A (en) 1976-01-29

Family

ID=

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