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:
Oct. 29, 1996
Filed:
Aug. 28, 1995
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A magnetic recording layer is formed on one surface of a card-shaped base plate. A printing layer, for printing visible information such as 'matters to be attended', is formed on the magnetic recording layer. A laser recording layer is formed on the other surface of the base plate. A visible image, which can be color-developed by radiation of a laser beam, can be recorded on the laser recording layer. The surface of the recording layer is coated with a transparent protection film, and a predetermined pattern is printed on the protection film. The laser recording layer includes a photothermic conversion material and a thermosensitive recording material. The photothermic conversion material has a major absorption wavelength corresponding to a major wavelength of the laser beam. A visible image can be recorded on the card by means of a laser beam without damaging a predetermined pattern on the protection film. Falsification of the visible image by means of a thermal pen can easily been discovered by checking a defect on the predetermined pattern. Therefore, falsification can be prevented.