发明名称 SPHERICAL GAME
摘要 A maze-like game featuring a non-linear, three-dimensional surface across which a ball having a relatively small distance is caused to move to follow a premarked path which is traced between and through certain holes communicating from the surface to a point exterior to the game.
申请公布号 US3666269(A) 申请公布日期 1972.05.30
申请号 USD3666269 申请日期 1970.06.05
申请人 DAVID W. GILCHRIST 发明人 DAVID W. GILCHRIST
分类号 A63B67/08;(IPC1-7):A63B67/00 主分类号 A63B67/08
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