| US 7,601,417 B2 | ||
| Recorded matter having countermeasure against forging | ||
| Hiroto Nakamura, Nagano-ken (Japan); Akio Owatari, Nagano-ken (Japan); Masataka Kamijo, Nagano-ken (Japan); and Yasuko Hirano, Nagano-ken (Japan) | ||
| Assigned to Seiko Epson Corporation, Tokyo (Japan) | ||
| Appl. No. 10/469,282 PCT Filed Dec. 18, 2002, PCT No. PCT/JP02/13226 § 371(c)(1), (2), (4) Date Aug. 28, 2003, PCT Pub. No. WO03/053708, PCT Pub. Date Jul. 03, 2003. |
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| Claims priority of application No. 2001-387116 (JP), filed on Dec. 20, 2001; and application No. 2002-186721 (JP), filed on Jun. 26, 2002. | ||
| Prior Publication US 2004/0151880 A1, Aug. 05, 2004 | ||
| Int. Cl. B32B 3/02 (2006.01); B32B 3/00 (2006.01) | ||
| U.S. Cl. 428—195.1 [428/143; 428/206; 428/325; 428/916; 427/7] | 4 Claims |
| 1. A recorded article comprising an overt recording region that is visible under ordinary light and that is incapable of reproduction
using a simple color copier and a covert recording region that is only visible under at least one of a special optical condition
and using a specific optical tool, and that is incapable of reproduction using a simple color copier, the overt recording
region and the covert recording region being disposed on a same recording medium,
wherein said covert recording region comprises an optical retroreflection layer having minute transparent spheres arranged
on a transparent reflecting layer, and
wherein said overt recording region and said covert recording region are at least partially superimposed.
|