AT131970B - Münzfernsprecher mit steuerbarem Luftschwingungszutritt zur Mikrophonmembran. - Google Patents

Münzfernsprecher mit steuerbarem Luftschwingungszutritt zur Mikrophonmembran.

Info

Publication number
AT131970B
AT131970B AT131970DA AT131970B AT 131970 B AT131970 B AT 131970B AT 131970D A AT131970D A AT 131970DA AT 131970 B AT131970 B AT 131970B
Authority
AT
Austria
Prior art keywords
air vibration
controllable air
pay phone
microphone membrane
access
Prior art date
Application number
Other languages
English (en)
Original Assignee
Naamlooze Vennootschap Elin Nl
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 Naamlooze Vennootschap Elin Nl filed Critical Naamlooze Vennootschap Elin Nl
Application granted granted Critical
Publication of AT131970B publication Critical patent/AT131970B/de

Links

AT131970D 1932-02-29 1932-02-29 Münzfernsprecher mit steuerbarem Luftschwingungszutritt zur Mikrophonmembran. AT131970B (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT131970T 1932-02-29

Publications (1)

Publication Number Publication Date
AT131970B true AT131970B (de) 1933-02-25

Family

ID=3637193

Family Applications (1)

Application Number Title Priority Date Filing Date
AT131970D AT131970B (de) 1932-02-29 1932-02-29 Münzfernsprecher mit steuerbarem Luftschwingungszutritt zur Mikrophonmembran.

Country Status (1)

Country Link
AT (1) AT131970B (de)

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