AU209781B2 - Improvements in or relating to devices for reproducing sound in closed spaces - Google Patents

Improvements in or relating to devices for reproducing sound in closed spaces

Info

Publication number
AU209781B2
AU209781B2 AU10733/55A AU1073355A AU209781B2 AU 209781 B2 AU209781 B2 AU 209781B2 AU 10733/55 A AU10733/55 A AU 10733/55A AU 1073355 A AU1073355 A AU 1073355A AU 209781 B2 AU209781 B2 AU 209781B2
Authority
AU
Australia
Prior art keywords
relating
devices
closed spaces
reproducing sound
reproducing
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 - Lifetime
Application number
AU10733/55A
Inventor
Wilhelmus deBruyn Johannes
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Filing date
Publication of AU209781B2 publication Critical patent/AU209781B2/en
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

AU10733/55A 1955-07-19 Improvements in or relating to devices for reproducing sound in closed spaces Expired - Lifetime AU209781B2 (en)

Publications (1)

Publication Number Publication Date
AU209781B2 true AU209781B2 (en)

Family

ID=

Similar Documents

Publication Publication Date Title
AU209781B2 (en) Improvements in or relating to devices for reproducing sound in closed spaces
AU211442B2 (en) Improvements in or relating to devices for reproducing sound
AU1402255A (en) Improvements in or relating to devices for reproducing sound
AU210044B2 (en) Improvements in or relating to devices for reproducing sound more particularly inclosed spaces
AU1402155A (en) Improvements in or relating to devices for reproducing sound more particularly inclosed spaces
AU210430B2 (en) Improvements in or relating to record changing phonographs
AU204972B2 (en) Improvements in or relating to control members in devices for playing gramophone records
AU1177455A (en) Improvements in or relating to record changing phonographs
AU1000155A (en) Improvements in or relating to control members in devices for playing gramophone records
AU206963B2 (en) Improvements in or relating to reels for mangetic recordertape
AU210478B2 (en) Improvements in or relating to devices for recording magne tograms
AU160068B2 (en) Improvements in or relating to sound reproducing devices
AU202219B2 (en) Improvements in or relating to discs intended for making sound carriers
AU206864B2 (en) Improvements in or relating to magnetic reproducing heads
AU209444B2 (en) Improvements in or relating to data storage devices
AU1466355A (en) Improvements in or relating to reels for mangetic recordertape
AU210086B2 (en) Improvements in and relating to recording devices
AU211977B2 (en) Improvements in and relating to gramophone pickups
AU1234455A (en) Improvements in or relating to devices for recording magne tograms
AU2140753A (en) Improvements in or relating to sound reproducing devices
AU578854A (en) Improvements in or relating to discs intended for making sound carriers
AU207095B2 (en) Improvements in or relating to recording voltmeters
AU205138B2 (en) Improvements in or relating to phonographs
AU204065B2 (en) Improvements in or relating to level recording apparatus
AU204605B2 (en) Improvements in or relating to gramophones