发明名称 Restricted access display system
摘要 A board that hides information in a manner that only certain authorized personnel may change the information and other authorized personnel may view the information. This invention accomplishes the foregoing by placing a locked panel of translucent material over certain information written on the board that may only be changed by an authorized individual by opening the lock. A panel of opaque material is placed over the translucent material in a manner that certain information written on the board will be revealed when authorized personnel remove the opaque material or cause the opaque material to be transparent. The translucent material may be removed by activating a switch or entering a code.
申请公布号 US2006121372(A1) 申请公布日期 2006.06.08
申请号 US20050274580 申请日期 2005.11.15
申请人 PITNEY BOWES INCORPORATED 发明人 WOLFMAN G. J.;SINGER BENJAMIN D.;SANSONE RONALD P.
分类号 G03C3/00;B44F1/10;G03C11/00;G03F1/00;G03G13/00;G03H1/04 主分类号 G03C3/00
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