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Class Information
Number: 84/439
Name: Music > Instruments > General features > Keyboards > Touch regulators
Description: Means to adjust the depth or other characteristics of the touch.










Sub-classes under this class:

Class Number Class Name Patents
84/440 Resistance 32


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8637755 Keyboard device for electronic musical instrument Jan. 28, 2014
8445765 Keyboard device May. 21, 2013
8222509 Pedal device of electronic keyboard musical instrument Jul. 17, 2012
8093480 Keyboard device for electronic keyboard instrument Jan. 10, 2012
8003871 Keyboard apparatus Aug. 23, 2011
7999162 Movable part firmly equipped with balance weight, musical instrument and method of assembling balance weight therein Aug. 16, 2011
7947887 Touch control apparatus of electronic musical instrument May. 24, 2011
7935875 Key actuating apparatus May. 3, 2011
7923619 Keyboard device Apr. 12, 2011
7858864 Key actuating apparatus Dec. 28, 2010
7847173 Compact device for adjusting piano key touch weight Dec. 7, 2010
7807911 Keyboard musical instrument having keys equipped with balancers biting into keys and method for securing balancers to keys Oct. 5, 2010
7807907 Keyboard musical instrument and action unit incorporated therein Oct. 5, 2010
7678981 Keyboard structure of electronic keyboard instrument Mar. 16, 2010
7608772 Black key for keyboard instrument and method of manufacturing a black key cover Oct. 27, 2009
7541530 Tone plate for keyboard-type tone plate percussion instrument, tone plate fabricating method, tone generator unit of tone plate percussion instrument, and keyboard-type percussion instrument Jun. 2, 2009
7402741 Keyboard apparatus Jul. 22, 2008
7166795 Method and apparatus for simulating a mechanical keyboard action in an electronic keyboard Jan. 23, 2007
7129404 Keyboard musical instrument having keys regulated with stable key balance pieces and process for fabricating keys Oct. 31, 2006
7111533 Multiple bit screwdriver Sep. 26, 2006
7067730 Keyboard musical instrument having keys regulated with stable key balance pieces Jun. 27, 2006
6995308 Electric keyboard assembly and method of manufacturing weight members provided in keyboard assembly Feb. 7, 2006
6815603 Unbreakable and economical optical sensor array and keyboard musical instrument using the same Nov. 9, 2004
6703552 Continuous music keyboard Mar. 9, 2004
6660920 Music operator with tension string for sensing action input Dec. 9, 2003
6531651 Key for musical instrument Mar. 11, 2003
6380469 Keyboard musical instrument equipped with key actuators accurately controlling key motion Apr. 30, 2002
6297437 Keyboard musical instrument and information processing system incorporated therein for discriminating different kinds of key motion Oct. 2, 2001
6218601 In-line keyboard Apr. 17, 2001
6153819 Note release control method for solenoid actuated piano actions Nov. 28, 2000
6147289 Keyboard assembly and method of manufacturing it Nov. 14, 2000
6060653 Method and apparatus for adjusting keys of a musical keyboard instrument from a weighted action to synthesizer feel May. 9, 2000
5977466 Keyboard musical instrument equipped with small simple economical key touch generator Nov. 2, 1999
5895875 Keyboard assembly for electronic musical instrument Apr. 20, 1999
5866831 Simulated piano action apparatus for electronic keyboard Feb. 2, 1999
5796023 Keyboard apparatus with white keys and black keys having action member driving sections at substantially the same location Aug. 18, 1998
5696340 Keyboards for electronic pianos Dec. 9, 1997
5574241 Keyboard apparatus with common stopper for key and hammer Nov. 12, 1996
5204486 Keyboard device of an electronic keyboard instrument Apr. 20, 1993
5158003 Keys for electronic musical instrument Oct. 27, 1992
5129301 Tracker touch apparatus utilizing magnetism for tactile feel Jul. 14, 1992
5062342 Piano action device for electronic keyboard musical instruments Nov. 5, 1991
5035168 Balance pin assembly for a piano key Jul. 30, 1991
4993305 Manual with piano effect for use in electronic organs Feb. 19, 1991
4972753 Electronic musical instrument Nov. 27, 1990
4899631 Active touch keyboard Feb. 13, 1990
4890533 Key device for electronic keyboard musical instrument Jan. 2, 1990
4860630 Manual for electronic organs and the like Aug. 29, 1989
4856407 Action mechanism for a keyboard of an electronic piano Aug. 15, 1989
4723471 Keyboard device Feb. 9, 1988

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