![]() ![]() Original Assignee Tomoegawa Paper Co Ltd 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 or warranty as to the accuracy of the list.) ![]() ( en Inventor Fukushi Kawakami Takayuki Sano Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Granted Application number US14/005,083 Other versions US9218800B2 Google Patents Sound transmission material, sound control plane structure including building use using the sound transmission material, windscreen for microphone, protective grille, sound transmission projection screen, and speakerÄownload PDF Info Publication number US20140233781A1 US20140233781A1 US14/005,083 US201214005083A US2014233781A1 US 20140233781 A1 US20140233781 A1 US 20140233781A1 US 201214005083 A US201214005083 A US 201214005083A US 2014233781 A1 US2014233781 A1 US 2014233781A1 Authority US United States Prior art keywords sound sound transmission transmission material speaker microphone Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US20140233781A1 - Sound transmission material, sound control plane structure including building use using the sound transmission material, windscreen for microphone, protective grille, sound transmission projection screen, and speaker US20140233781A1 - Sound transmission material, sound control plane structure including building use using the sound transmission material, windscreen for microphone, protective grille, sound transmission projection screen, and speaker ![]()
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