Emergency message display sign

Details Emergency message display sign Emergency message display sign

1983-01-03

1985-09-24

Kemper, Catherine E.

Sales and advertising equipment

Signs or display forms

Attachable to vertical surface or hanging type

Patent

active

D02807459

REFERENCES:
patent: D268349 (1983-03-01), Cobb
patent: D268350 (1983-03-01), Cobb

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