IE19320L - Voice-frequency signalling apparatus. - Google Patents

Voice-frequency signalling apparatus.

Info

Publication number
IE19320L
IE19320L IE29348A IE29348A IE19320L IE 19320 L IE19320 L IE 19320L IE 29348 A IE29348 A IE 29348A IE 29348 A IE29348 A IE 29348A IE 19320 L IE19320 L IE 19320L
Authority
IE
Ireland
Prior art keywords
voice
signalling apparatus
frequency signalling
frequency
signalling
Prior art date
Application number
IE29348A
Original Assignee
Standard Telephones Cables Ltd
Thomas Frederick Stanley Hargreaves
William Frederick Gould
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 Standard Telephones Cables Ltd, Thomas Frederick Stanley Hargreaves, William Frederick Gould filed Critical Standard Telephones Cables Ltd
Priority to IE29348A priority Critical patent/IE19320L/en
Publication of IE19320L publication Critical patent/IE19320L/en

Links

IE29348A 1948-04-19 1948-04-19 Voice-frequency signalling apparatus. IE19320L (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IE29348A IE19320L (en) 1948-04-19 1948-04-19 Voice-frequency signalling apparatus.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE29348A IE19320L (en) 1948-04-19 1948-04-19 Voice-frequency signalling apparatus.

Publications (1)

Publication Number Publication Date
IE19320L true IE19320L (en) 1948-10-30

Family

ID=11009994

Family Applications (1)

Application Number Title Priority Date Filing Date
IE29348A IE19320L (en) 1948-04-19 1948-04-19 Voice-frequency signalling apparatus.

Country Status (1)

Country Link
IE (1) IE19320L (en)

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