Clipboard case

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

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D19 90, D19 78, D19 65, 1902

Patent

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D03986500

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patent: D261903 (1981-11-01), Mulder
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patent: D366501 (1996-01-01), Shamoon
patent: D379477 (1997-05-01), Shamoon
patent: 3977744 (1976-08-01), Dewitt
patent: 4645163 (1987-02-01), Zovar
patent: 4919037 (1990-04-01), MItchell

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