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专利名称：Keyboard发明人：Masanori Katsuta申请号：US07/550626申请日：19900710公开号：US050815A公开日：19920121
摘要：A keyboard in which a stopper portion of an upper limit stopper of a black keydetours an upper limit stopper of an adjoining white key so as to lie away from the blackkey side by side with a stopper portion of the upper limit stopper of the white key.
申请人：KABUSHIKI KAISHA KAWAI GAKKI SEISAKUSHO
代理人：Irving M. Weiner,Joseph P. Carrier,Robert M. Petrik
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