专利名称：Keyboard instrument
发明人：Yukihide Takata,Yoshiyasu Kitagawa申请号：US16274251申请日：20190213公开号：US11145278B2公开日：20211012
专利附图：
摘要：There is provided a keyboard instrument in which a plurality of white keys and aplurality of black keys are arranged in a widthwise direction, a total width dimension ofthe plurality of white keys that constitute one octave is set to 160 mm or less, and awidth dimension of an upper surface of each of the black keys is set to 9 mm or more and
10.5 mm or less.
申请人：Roland Corporation
地址：Shizuoka JP
国籍：JP
代理机构：JCIPRNET
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