发明名称 NOVELTY KEY CHAIN
摘要 A novelty key chain which comprises a body of transparent rigid material having a bore in one side thereof in the base of which is disposed a first magnet, and a push button slidably disposed in the outer portion of the bore with a second magnet on its inner end, the adjacent ends of the magnets being of like polarity so as to normally maintain the push button in extended position.
申请公布号 US3664039(A) 申请公布日期 1972.05.23
申请号 USD3664039 申请日期 1971.04.06
申请人 RAYTHEON CO. 发明人 PALMER P. DERBY
分类号 G09B23/06;G09B23/18;(IPC1-7):G09B23/06 主分类号 G09B23/06
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