Adjustable ergonomic document holder

Office supplies; artists and teachers materials – Office equipment not elsewhere specified – Holder or file

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Details

D 6419, D19 90, D19 91

Patent

active

D03586111

REFERENCES:
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patent: 2583097 (1952-01-01), Heimann
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patent: 4893775 (1990-01-01), Long
patent: 4978096 (1990-12-01), Struckmann
patent: 4998703 (1991-03-01), Stewart
patent: 5052650 (1991-10-01), Beile et al.
patent: 5054736 (1991-10-01), Champoux

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