| 摘要 |
PROBLEM TO BE SOLVED: To provide a multilayer writing board which enables anyone to simply conduct the work of substantial replacement of a blackboard surface at low cost. SOLUTION: A lower-layer writing board 1 is disposed on a base plate 5 and one or a plurality of upper-layer writing boards 2 are stacked on the lower-layer writing board so that they can be taken off. By taking off the writing board of the uppermost layer, the writing board appearing below it is made usable. The writing boards are connected to each other by magnetic attraction or a double-sided adhesive tape, or by the medium of an easy-to-peel adhesive tape. Each writing board is a blackboard or a whiteboard, for instance. COPYRIGHT: (C)2007,JPO&INPIT
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