AU477212A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
AU477212A
AU477212A AU4772/12A AU477212A AU477212A AU 477212 A AU477212 A AU 477212A AU 4772/12 A AU4772/12 A AU 4772/12A AU 477212 A AU477212 A AU 477212A AU 477212 A AU477212 A AU 477212A
Authority
AU
Australia
Prior art keywords
relating
telephone systems
telephone
systems
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
AU4772/12A
Inventor
Electrical Engineer Van Buren and Morgan Streets Chicago Illinois U. SA John George Blessing
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.)
Automatic Electric Co
Original Assignee
Automatic Electric Co
Filing date
Publication date
Application filed by Automatic Electric Co filed Critical Automatic Electric Co
Publication of AU477212A publication Critical patent/AU477212A/en
Expired legal-status Critical Current

Links

AU4772/12A 1912-05-01 Improvements in or relating to telephone systems Expired AU477212A (en)

Publications (1)

Publication Number Publication Date
AU477212A true AU477212A (en) 1913-08-05

Family

ID=

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