发明名称 Arithmetic board game
摘要 A competitive board game in which two playing boards are used and a set of 117 tiles for placement upon the playing boards, the playing boards having spaces where the tiles are to be placed, some of the tiles having arithmetic addition, subtraction, multiplication and division symbols while other of the tiles have the numerical digits, the game using arithmetic so to be played.
申请公布号 US4017080(A) 申请公布日期 1977.04.12
申请号 US19750614067 申请日期 1975.09.17
申请人 SEVERSON, RICHARD W. 发明人 SEVERSON, RICHARD W.
分类号 A63F3/04;(IPC1-7):A63F9/18 主分类号 A63F3/04
代理机构 代理人
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