Patent ID: 11863723
Assignee: SEIKO EPSON CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A document determination system comprising:
an information processing device that stores identification information in association with document information;
a printing device that prints a document image corresponding to the document information and a code image indicating the identification information on a print medium to generate a normal printed matter; and
a reading device that reads a print image printed on a printed matter, wherein
the printing device prints the code image in a preset end region of the print medium, and
the information processing device determines whether the printed matter is the normal printed matter or a copied printed matter obtained by copying the normal printed matter, based on the code image included in the print image read by the reading device, and
a part of the code image disappears in the copied printed matter.