Marker for emergency evacuation

Details Marker for emergency evacuation Marker for emergency evacuation

1986-09-11

1990-01-30

Burke, Wallace R.

Sales and advertising equipment

Signs or display forms

Card type

D20 10

Patent

active

D03057798

REFERENCES:
patent: 259544 (1982-06-01), Howard
patent: 284587 (1986-07-01), Nally
patent: 299254 (1989-01-01), Martin et al.
patent: 1944276 (1934-01-01), Schepmoes
patent: 2085807 (1937-07-01), Lindsey
patent: 2480584 (1949-08-01), Kohlhauer et al.
patent: 3181134 (1965-04-01), Le Saint et al.
patent: 3336456 (1967-08-01), Ploetz
patent: 3408025 (1968-10-01), Davis
patent: 3591941 (1971-07-01), Jaffe, Jr.
patent: 3663781 (1972-05-01), Zimmerman et al.
patent: 3665626 (1972-05-01), Lund et al.
patent: 4208983 (1980-06-01), Buckley
patent: 4385586 (1983-05-01), Schriever

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