Inventor · disambiguated record
Hajime Hayashida
Also filed as: HAYASHIDA HAJIME
9 granted patents·123 citations·filing 1977–1995
89Inventor score
Technology areasG10C
Top patents by PatentIndex Score
9 records- 0160US4524669AKey-driving/detecting mechanism for keyboard instrumentNIPPON MUSICAL INSTRUMENTS MFG·Filed 1982·Granted Jun 25, 1985·14 cites·14 claims
- 0259US5170000ASound board assembly for musical instrumentsYAMAHA CORP·Filed 1990·Granted Dec 8, 1992·22 cites·30 claims
- 0355US5353671AUpright piano with key action mechanism responsive to repetition without double strike and loss of soundYAMAHA CORP·Filed 1993·Granted Oct 11, 1994·17 cites·9 claims
- 0454US5557052AKeyboard musical instrument having variable contact point between jack and regulation buttonYAMAHA CORP·Filed 1995·Granted Sep 17, 1996·19 cites·12 claims
- 0554US5196638AMuting device of upright pianoYAMAHA CORP·Filed 1991·Granted Mar 23, 1993·16 cites·4 claims
- 0645US5583306AKeyboard musical instrument having jacks changeable in escape speed between acoustic sound mode and silent modeYAMAHA CORP·Filed 1995·Granted Dec 10, 1996·12 cites·14 claims
- 0743US5616880AKeyboard musical instrument equipped with hammer shank stopper where hammer assembly rebounds without deflection of shankYAMAHA CORP·Filed 1995·Granted Apr 1, 1997·12 cites·14 claims
- 0841US4135430APiano hammerNIPPON MUSICAL INSTRUMENTS MFG·Filed 1977·Granted Jan 23, 1979·5 cites·12 claims
- 0934US4924742AMechanical keyboard instrument with pedal mechanismsYAMAHA CORP·Filed 1989·Granted May 15, 1990·6 cites·12 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →