Alarm mat
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United States of America Patent
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Aug 25, 2015
Grant Date -
Feb 20, 2014
app pub date -
Aug 20, 2012
filing date -
Aug 20, 2012
priority date (Note) -
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Abstract
An alarm mat includes a sheet, and sound producer from which sound is produced by air inflow and outflow. The sheet is provided with a plurality of projections made of an elastic material, projecting toward an upper-surface side of the sheet with top portions thereof continuously extending, and each having a sealed cavity inside. The plurality of projections are juxtaposed to each other. The sound producer is loaded in the sheet in a manner that air flows in and out of the projections through the sound producer alone.
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