Pipe harmonica
United States Patent 2754714
US Patent References:
/0192061.html
- - 0192061

/0532642.html
- - 0532642

/0780674.html
- - 0780674

/0797232.html
- - 0797232

Whistle
- - 1688349


Inventors:
Robert, Folsom Theodore
Publication Date:
07/17/1956
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Assignee:
Robert, Folsom Theodore
Primary Class:
84/330
Other Classes:
84/376R, 984/137, 84/380R, 84/380C, 446/204
International Classes:
G10D7/12; G10D7/00
US Patent References:
1744570Apparatus for producing sounds
2496134Gas flow indicator
2506039Musical toy
Foreign References:
FR370684A