Emergency signal flag

Details Emergency signal flag Emergency signal flag

1991-11-12

1993-10-19

Burke, Wallace R.

Measuring, testing, or signalling instruments

Security or signal instrument or casing

Visual

D11166

Patent

active

D03404170

REFERENCES:
patent: 2458316 (1949-01-01), Swertlow
patent: 4565152 (1986-01-01), Bennett
patent: 4729338 (1988-03-01), Relymann

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