Marker

Details Marker Marker

1983-12-20

1986-08-05

Kemper, Catherine E.

Sales and advertising equipment

Signs or display forms

Card type

D20 42

Patent

active

D02849828

REFERENCES:
patent: 1257989 (1918-03-01), Ewing
patent: 1411559 (1922-04-01), Ashcroft
patent: 2538381 (1951-01-01), Radcliffe

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