DUPLO MANUFACTURING CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4605926 Illegal-sheet-material detection apparatus in sheet material manufacturing machineExpiredSep 13, 82Aug 12, 86[G08B, H04Q, B65H]
4566383 Winding apparatus for removing used stencilExpiredAug 20, 84Jan 28, 86[B41L]
4563947 Ink detecting device for rotary printerExpiredJan 29, 85Jan 14, 86[B41F]

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