A whistle comprising a one-piece tubular body having a mouth portion at one end and a longitudinal bore of two sizes with a shoulder formed between the two size bores, the smaller mouth portion end of the body and provided with a sound-producing opening. G10K- SOUND-PRODUCING DEVICES METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL ACOUSTICS NOT OTHERWISE PROVIDED FORĢ.241000282472 Canis lupus familiaris Species 0.000 description 12.
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Google Patents US2245484A - Dog whistleĭownload PDF Info Publication number US2245484A US2245484A US363893A US36389340A US2245484A US 2245484 A US2245484 A US 2245484A US 363893 A US363893 A US 363893A US 36389340 A US36389340 A US 36389340A US 2245484 A US2245484 A US 2245484A Authority US United States Prior art keywords whistle plunger bore sound dog Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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