Emergency road sign

Details Emergency road sign Emergency road sign

1991-07-11

1993-05-11

Burke, Wallace R.

Sales and advertising equipment

Signs or display forms

D10109

Patent

active

D03355071

REFERENCES:
patent: D104569 (1937-05-01), Hammer
patent: D111585 (1938-12-01), Kay
patent: D119041 (1940-02-01), MacDonald et al.
patent: 4016450 (1977-04-01), Balekjian
patent: 4328481 (1982-04-01), Sexton
patent: 4711044 (1987-12-01), Danjell

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