CH60214A - Microphone - Google Patents

Microphone

Info

Publication number
CH60214A
CH60214A CH60214A CH60214DA CH60214A CH 60214 A CH60214 A CH 60214A CH 60214 A CH60214 A CH 60214A CH 60214D A CH60214D A CH 60214DA CH 60214 A CH60214 A CH 60214A
Authority
CH
Switzerland
Prior art keywords
microphone
Prior art date
Application number
CH60214A
Other languages
Italian (it)
Inventor
Carlo Guicciardini
Attilio Calvelli
Original Assignee
Carlo Guicciardini
Attilio Calvelli
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 Carlo Guicciardini, Attilio Calvelli filed Critical Carlo Guicciardini
Publication of CH60214A publication Critical patent/CH60214A/en

Links

CH60214A 1912-04-19 1912-04-19 Microphone CH60214A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH60214T 1912-04-19

Publications (1)

Publication Number Publication Date
CH60214A true CH60214A (en) 1913-07-01

Family

ID=4302924

Family Applications (1)

Application Number Title Priority Date Filing Date
CH60214A CH60214A (en) 1912-04-19 1912-04-19 Microphone

Country Status (1)

Country Link
CH (1) CH60214A (en)

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