DK552C - Device for Telephones to Indicate the Duration and Number of Calls. - Google Patents

Device for Telephones to Indicate the Duration and Number of Calls.

Info

Publication number
DK552C
DK552C DK552DA DK552C DK 552 C DK552 C DK 552C DK 552D A DK552D A DK 552DA DK 552 C DK552 C DK 552C
Authority
DK
Denmark
Prior art keywords
telephones
calls
duration
indicate
Prior art date
Application number
Other languages
Danish (da)
Inventor
Heinrich Eichwede
Original Assignee
Heinrich Eichwede
Publication date
Application granted granted Critical
Publication of DK552C publication Critical patent/DK552C/en

Links

DK552D Device for Telephones to Indicate the Duration and Number of Calls. DK552C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK552T

Publications (1)

Publication Number Publication Date
DK552C true DK552C (en) 1896-06-08

Family

ID=27817135

Family Applications (1)

Application Number Title Priority Date Filing Date
DK552D DK552C (en) Device for Telephones to Indicate the Duration and Number of Calls.

Country Status (1)

Country Link
DK (1) DK552C (en)

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