Toy whistle

Details Toy whistle Toy whistle

1991-01-31

1992-10-27

Burke, Wallace R.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Aural, i.e., audible

Patent

active

D03305236

REFERENCES:
patent: 61846 (1867-02-01), McClain
patent: D140756 (1945-02-01), Thompson
patent: D241539 (1976-09-01), Iverson
patent: 805817 (1905-11-01), Pardoe
patent: 3738056 (1973-06-01), Schultz

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