AU115587B2 - Granulated carbon microphone - Google Patents

Granulated carbon microphone

Info

Publication number
AU115587B2
AU115587B2 AU2279/41A AU227941A AU115587B2 AU 115587 B2 AU115587 B2 AU 115587B2 AU 2279/41 A AU2279/41 A AU 2279/41A AU 227941 A AU227941 A AU 227941A AU 115587 B2 AU115587 B2 AU 115587B2
Authority
AU
Australia
Prior art keywords
granulated carbon
carbon microphone
microphone
granulated
carbon
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
AU2279/41A
Other versions
AU227941A (en
Inventor
DeBoer Jan
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of AU227941A publication Critical patent/AU227941A/en
Publication of AU115587B2 publication Critical patent/AU115587B2/en
Expired legal-status Critical Current

Links

AU2279/41A 1941-07-25 Granulated carbon microphone Expired AU115587B2 (en)

Publications (2)

Publication Number Publication Date
AU227941A AU227941A (en) 1942-08-06
AU115587B2 true AU115587B2 (en) 1942-08-06

Family

ID=

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