Child's lap desk and blackboard

Office supplies; artists and teachers materials – Equipment for writing – drawing – or for fine arts – Writing or drawing surface – e.g. – blackboard – drawing board,...

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D 6406, D19 36

Patent

active

D02802163

REFERENCES:
patent: D174015 (1955-02-01), Bosma
patent: D215943 (1969-11-01), Grainer
patent: D221012 (1971-06-01), Holland
patent: D268622 (1983-04-01), Wolters et al.
patent: 3506324 (1970-04-01), Fristedt
patent: 3701576 (1972-10-01), Moen
patent: 3734341 (1973-05-01), Levenhagen

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