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AU570838A - Improvements in or relating to loudspeakers and microphones - Google Patents

Improvements in or relating to loudspeakers and microphones

Info

Publication number
AU570838A
AU570838A AU5708/38A AU570838A AU570838A AU 570838 A AU570838 A AU 570838A AU 5708/38 A AU5708/38 A AU 5708/38A AU 570838 A AU570838 A AU 570838A AU 570838 A AU570838 A AU 570838A
Authority
AU
Australia
Prior art keywords
loudspeakers
microphones
relating
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
AU5708/38A
Other versions
AU109461B2 (en
Inventor
Frederick Sirera William
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.)
Marconis Wireless Telegraph Co Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Filing date
Publication date
Application filed by Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Application granted granted Critical
Publication of AU570838A publication Critical patent/AU570838A/en
Publication of AU109461B2 publication Critical patent/AU109461B2/en
Expired legal-status Critical Current

Links

AU5708/38A 1938-12-29 Improvements in or relating to loudspeakers and microphones Expired AU109461B2 (en)

Publications (2)

Publication Number Publication Date
AU570838A true AU570838A (en) 1940-01-11
AU109461B2 AU109461B2 (en) 1940-01-11

Family

ID=

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