Additional instruments for the generation of harmonic tones in grand pianos and pianos

• 1. 三角钢琴的组装方法、三角钢琴的侧板及其制造方法、三角钢琴的臂及其制作方法以及键盘乐器 [P] . 中国专利： CN1189909A . 1998-08-05
• 2. 在支点上具有壳体的钢琴类乐器、特别是钢琴 [P] . 中国专利： CN109616084A . 2019-04-12
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  机译： 钢琴的背景音块armariocepo钢琴的背景声共振armari三角钢琴和三角钢琴semelhano乐器和乐器类似

• 4. GRAND PIANO ASSEMBLING METHOD, HEEL OF GRAND PIANO AND METHOD OF MANUFACTURING THE SAME, ARM OF GRAND PIANO AND METHOD OF MANUFACTURING THE SAME, AND KEYBOARD INSTRUMENT [P] . 世界知识产权组织专利： WO9740490A1 . 1997-10-30

  机译： 大钢琴的组装方法，大钢琴的脚跟和制造方法，大钢琴的臂，制造方法和键盘乐器

• 5. Musical instruments, grand pianos and upright pianos [P] . 日本专利： JP6031760B2 . 2016-11-24

  机译： 乐器，三角钢琴和立式钢琴

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• 5. Improving grand piano tone radiation for surround‐type of concert halls [O] . Harold A. Conklin, Daniel W. Martin 1979

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