发明名称 Three-dimensional multi-tiered chess board
摘要 A square multi-tiered game board primarily for use in the games of chess and checkers which includes a plurality of upward facing, parallel, horizontal tiers, each said tier enclosing a center space therebetween. The tiers are arranged in internally descending order starting at the upper and outermost tier of the game board and descending stepwise to an innermost and lowest tier.
申请公布号 US5358252(A) 申请公布日期 1994.10.25
申请号 US19930157227 申请日期 1993.11.23
申请人 MCPHAUL, ALFRED 发明人 MCPHAUL, ALFRED
分类号 A63F3/02;(IPC1-7):A63F3/02 主分类号 A63F3/02
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