Whistle

Details Whistle Whistle

1986-08-08

1988-01-12

Kemper, Catherine E.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Aural, i.e., audible

D21 64

Patent

active

D02936577

REFERENCES:
patent: D263383 (1982-03-01), Moore
patent: D279461 (1985-07-01), LaFreniere et al.
patent: 2936547 (1960-05-01), Weems

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