DK45289C - Device for Determining the Duration of Telephone Calls. - Google Patents

Device for Determining the Duration of Telephone Calls.

Info

Publication number
DK45289C
DK45289C DK45289DA DK45289C DK 45289 C DK45289 C DK 45289C DK 45289D A DK45289D A DK 45289DA DK 45289 C DK45289 C DK 45289C
Authority
DK
Denmark
Prior art keywords
duration
determining
telephone calls
calls
telephone
Prior art date
Application number
Other languages
Danish (da)
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Application granted granted Critical
Publication of DK45289C publication Critical patent/DK45289C/en

Links

DK45289D 1930-03-29 1931-03-14 Device for Determining the Duration of Telephone Calls. DK45289C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE45289X 1930-03-29

Publications (1)

Publication Number Publication Date
DK45289C true DK45289C (en) 1932-02-22

Family

ID=20264396

Family Applications (1)

Application Number Title Priority Date Filing Date
DK45289D DK45289C (en) 1930-03-29 1931-03-14 Device for Determining the Duration of Telephone Calls.

Country Status (1)

Country Link
DK (1) DK45289C (en)

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