DK62489C - Elektrisk Tonefrekvenssignalanlæg. - Google Patents

Elektrisk Tonefrekvenssignalanlæg.

Info

Publication number
DK62489C
DK62489C DK62489DA DK62489C DK 62489 C DK62489 C DK 62489C DK 62489D A DK62489D A DK 62489DA DK 62489 C DK62489 C DK 62489C
Authority
DK
Denmark
Prior art keywords
signaling system
tone frequency
frequency signaling
electric tone
electric
Prior art date
Application number
Other languages
English (en)
Original Assignee
Int 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
Application filed by Int Standard Electric Corp filed Critical Int Standard Electric Corp
Application granted granted Critical
Publication of DK62489C publication Critical patent/DK62489C/da

Links

DK62489D 1938-05-20 1939-05-17 Elektrisk Tonefrekvenssignalanlæg. DK62489C (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB62489X 1938-05-20

Publications (1)

Publication Number Publication Date
DK62489C true DK62489C (da) 1944-07-24

Family

ID=9811101

Family Applications (1)

Application Number Title Priority Date Filing Date
DK62489D DK62489C (da) 1938-05-20 1939-05-17 Elektrisk Tonefrekvenssignalanlæg.

Country Status (1)

Country Link
DK (1) DK62489C (da)

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