AU116874B2 - Improvements in or relating to selective circuits for alternating current signalling systems - Google Patents

Improvements in or relating to selective circuits for alternating current signalling systems

Info

Publication number
AU116874B2
AU116874B2 AU4241/42A AU424142A AU116874B2 AU 116874 B2 AU116874 B2 AU 116874B2 AU 4241/42 A AU4241/42 A AU 4241/42A AU 424142 A AU424142 A AU 424142A AU 116874 B2 AU116874 B2 AU 116874B2
Authority
AU
Australia
Prior art keywords
relating
alternating current
signalling systems
selective circuits
current signalling
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
AU4241/42A
Other versions
AU424142A (en
Inventor
Morton Hadfjei Bertram
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.)
It Current Ofthe Signal Frequency
Original Assignee
It Current Ofthe Signal Frequency
Filing date
Publication date
Application filed by It Current Ofthe Signal Frequency filed Critical It Current Ofthe Signal Frequency
Application granted granted Critical
Publication of AU424142A publication Critical patent/AU424142A/en
Publication of AU116874B2 publication Critical patent/AU116874B2/en
Expired legal-status Critical Current

Links

AU4241/42A 1943-04-20 Improvements in or relating to selective circuits for alternating current signalling systems Expired AU116874B2 (en)

Publications (2)

Publication Number Publication Date
AU424142A AU424142A (en) 1943-05-06
AU116874B2 true AU116874B2 (en) 1943-05-06

Family

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