发明授权
- 专利标题： Magnetic metallic safeguarding thread with negative writing and a method of making same
- 专利标题（中）： 具有负写作的磁性金属保护线及其制作方法
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申请号： US284115申请日： 1994-08-02
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公开(公告)号： US5599047A公开(公告)日： 1997-02-04
- 发明人: Wittich Kaule , Michael Boehm , Walter Schneider , Theodor Burchard
- 申请人： Wittich Kaule , Michael Boehm , Walter Schneider , Theodor Burchard
- 申请人地址： DEX Munich
- 专利权人： GAO Gesellschaft Fur Automation und Organisation mbH
- 当前专利权人： GAO Gesellschaft Fur Automation und Organisation mbH
- 当前专利权人地址： DEX Munich
- 优先权： DEX4041025.0 19901220
- 主分类号： B42D15/00
- IPC分类号： B42D15/00 ; B42D25/355 ; B42D15/02
摘要：
The invention relates to a security document, in particular a bank note, identity card or the like, having a security element which is provided with characters, patterns, etc., visually readable at least in transmitted light and which is electrically conductive and bears additional substances for machine testing, and to a method for producing such a security element. The security element preferably consists of a transparent film strip that bears negative writing readily capable of visual checking and is additionally provided with electrically conductive and magnetic substances.
公开/授权文献
- US4385120A Thermostable glycerokinases and process for its production 公开/授权日：1983-05-24
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