发明授权
US07433075B2 Method and image forming apparatus, and printing system for recording invisible information recording
失效
方法和图像形成装置以及用于记录不可见信息记录的打印系统
- 专利标题: Method and image forming apparatus, and printing system for recording invisible information recording
- 专利标题(中): 方法和图像形成装置以及用于记录不可见信息记录的打印系统
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申请号: US09942995申请日: 2001-08-31
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公开(公告)号: US07433075B2公开(公告)日: 2008-10-07
- 发明人: Kazuyoshi Tokunaga , Kazuyuki Mitome , Seiji Kageyama
- 申请人: Kazuyoshi Tokunaga , Kazuyuki Mitome , Seiji Kageyama
- 申请人地址: JP Tokyo
- 专利权人: Ricoh Printing Systems, Ltd.
- 当前专利权人: Ricoh Printing Systems, Ltd.
- 当前专利权人地址: JP Tokyo
- 代理机构: McGinn IP Law Group, PLLC
- 优先权: JPP.2000-265222 20000901; JPP.2001-205729 20010706
- 主分类号: G06F15/00
- IPC分类号: G06F15/00 ; G06K15/00
摘要:
Invisible information are recorded in the form of pixels invisible to the naked eye and at a print density invisible to the naked eye.
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