发明授权
US4841911A Variable maze device 失效
可变迷宫装置

Variable maze device
摘要:
A variable maze device for enriching the environment of a contained primate, or for use as a crib toy, the device including a variable and programmable maze as well as a mechanism whereby a contained primate or a human infant may be instructed as to the location of the correct pathway through the maze.
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