DK21777C - Thermophone. - Google Patents

Thermophone.

Info

Publication number
DK21777C
DK21777C DK21777DA DK21777C DK 21777 C DK21777 C DK 21777C DK 21777D A DK21777D A DK 21777DA DK 21777 C DK21777 C DK 21777C
Authority
DK
Denmark
Prior art keywords
thermophone
Prior art date
Application number
Other languages
Danish (da)
Original Assignee
De Nl Thermo Telephoon Mij Nv
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.)
Publication date
Application granted granted Critical
Publication of DK21777C publication Critical patent/DK21777C/en

Links

DK21777D 1915-04-26 Thermophone. DK21777C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE21777X 1915-04-26

Publications (1)

Publication Number Publication Date
DK21777C true DK21777C (en) 1917-01-02

Family

ID=27815249

Family Applications (1)

Application Number Title Priority Date Filing Date
DK21777D DK21777C (en) 1915-04-26 Thermophone.

Country Status (1)

Country Link
DK (1) DK21777C (en)

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