Thread: PC 50 Whistle
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  #28 (permalink)  
Old Tue Apr 19, 2011, 05:36pm
caliref caliref is offline
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Join Date: Dec 2005
Posts: 40
The overall design of the whistle and the way the acoustic part of the whistle are cut make me think that there is a potential patent infringement here on a Fox 40 whistle.
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