CH79265A - Verbesserung an Thermotelephonen und -mikrophonen - Google Patents

Verbesserung an Thermotelephonen und -mikrophonen

Info

Publication number
CH79265A
CH79265A CH79265A CH79265DA CH79265A CH 79265 A CH79265 A CH 79265A CH 79265 A CH79265 A CH 79265A CH 79265D A CH79265D A CH 79265DA CH 79265 A CH79265 A CH 79265A
Authority
CH
Switzerland
Prior art keywords
microphones
telephones
improvement
thermal
thermal telephones
Prior art date
Application number
CH79265A
Other languages
English (en)
Inventor
Naamlooze Vennoot Maatschappij
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.)
Filing date
Publication date
Application filed by De Nl Thermo Telephoon Mij Nv filed Critical De Nl Thermo Telephoon Mij Nv
Publication of CH79265A publication Critical patent/CH79265A/de

Links

CH79265A 1918-03-25 1918-03-25 Verbesserung an Thermotelephonen und -mikrophonen CH79265A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH79265T 1918-03-25

Publications (1)

Publication Number Publication Date
CH79265A true CH79265A (de) 1918-10-16

Family

ID=4332479

Family Applications (1)

Application Number Title Priority Date Filing Date
CH79265A CH79265A (de) 1918-03-25 1918-03-25 Verbesserung an Thermotelephonen und -mikrophonen

Country Status (1)

Country Link
CH (1) CH79265A (de)

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