AU114466B2 - Improvements in microphones - Google Patents

Improvements in microphones

Info

Publication number: AU114466B2
Authority: AU; Australia
Prior art keywords: microphones
Prior art date: 1940-12-28
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

AU4415/40A

Other versions

AU441540A (en

Inventor

Ferdinand Olson Harry

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

BAE Systems Electronics Ltd

Original Assignee

Marconis Wireless Telegraph Co Ltd

Filing date

1940-12-28

Publication date

1942-01-10

1940-12-28 Application filed by Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd

1942-01-10 Application granted granted Critical

1942-01-10 Publication of AU114466B2 publication Critical patent/AU114466B2/en

1942-01-10 Publication of AU441540A publication Critical patent/AU441540A/en

Status Expired legal-status Critical Current

Links

AU4415/40A 1940-12-28 Improvements in microphones Expired AU114466B2 (en)

Publications (2)

Publication Number	Publication Date
AU114466B2 true AU114466B2 (en)	1942-01-10
AU441540A AU441540A (en)	1942-01-10

Family

ID=

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