The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 1994
Filed:
Jan. 14, 1993
Masato Nishida, Ibaraki, JP;
Toshio Oshima, Toride, JP;
Tsunemi Ohiwa, Osaka, JP;
Takato Karashima, Nishinomiya, JP;
Hitachi Maxell, Ltd., Osaka, JP;
Abstract
An infrared-absorbing mark printed matter in which an infrared-absorbing mark is formed on a substrate by printing with an ink having high light absorptivity in the infrared region; the infrared-absorbing mark is covered up by smearing with an ink having high light absorptivity in the visible region and pervious to light in the infrared region to form a colored concealing layer; and on the colored concealing layer is formed a white concealing layer by printing with an ink containing a white pigment and an extender pigment of which at least part of the particles are those having an average particle size of 3 to 20 .mu.m.