Emergency sign

Details Emergency sign Emergency sign

1988-04-04

1991-02-26

Burke, Wallace R.

Sales and advertising equipment

Signs or display forms

D10104

Patent

active

D03149838

REFERENCES:
patent: D303402 (1989-09-01), Brown
patent: 1877044 (1932-09-01), Peck et al.
patent: 2612548 (1952-09-01), Swanson
patent: 2732643 (1956-01-01), Johnson
patent: 3516187 (1970-06-01), Espinosa

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