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:
Aug. 15, 2006
Filed:
Feb. 27, 2004
Minoru Azakami, Shinjuku-Ku, JP;
Kenji Ueda, Shinjuku-Ku, JP;
Tetsuya Toshine, Numazu, JP;
Toru Nishioka, Ushiku, JP;
Atsushi Umezawa, Ushiku, JP;
Akihiro Mizumura, Ushiku, JP;
Minoru Azakami, Shinjuku-Ku, JP;
Kenji Ueda, Shinjuku-Ku, JP;
Tetsuya Toshine, Numazu, JP;
Toru Nishioka, Ushiku, JP;
Atsushi Umezawa, Ushiku, JP;
Akihiro Mizumura, Ushiku, JP;
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Abstract
A magnetic card of the invention comprises a card substrateon which a magnetic layer, a thin-film layerformed of a metal or a metal compound for concealing the magnetic layer, a printed layerand a volume hologram layerare successively provided, wherein magnetic information is recorded on or read from a volume hologram layer side. The volume hologram layeris composed essentially of a photosensitive material comprising a cationic polymerizable compound, a radical polymerizable compound, a photo-radical polymerization initiator system that is sensitive to light of a specific wavelength to polymerize the radical polymerizable compound, and a photo-cationic polymerization initiator system that is less sensitive to the light of a specific wavelength but sensitive to light of another wavelength to polymerize the cationic polymerizable compound. The magnetic card is improved in terms of wear resistance to sliding contact with a magnetic head, and ensures precise writing or reading of magnetic recording data, with improved ability to prevent forgery.