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Class Information
Number: 84/294
Name: Music > Instruments > Stringed > Details > Resonance devices
Description: Devices for changing the quality of tone of an instrument, as air-cavities, extra sounding-boards, sympathetically-vibrating parts, or small membranes.










Sub-classes under this class:

Class Number Class Name Patents
84/295 Auxiliary strings 7
84/296 With diaphragm 11


Patents under this class:
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Patent Number Title Of Patent Date Issued
8710337 Tone enhancement bracket Apr. 29, 2014
8642860 String music instrument and sound board Feb. 4, 2014
8614383 Lap tapping instrument Dec. 24, 2013
8592668 Wolf note elimination device for a stringed instrument Nov. 26, 2013
8399758 Tone control device for use with a musical instrument and method for making the same Mar. 19, 2013
8389835 Sound system in a stringed musical instrument Mar. 5, 2013
8283551 Vibration apparatus and method for seasoning stringed musical instruments Oct. 9, 2012
8278538 Resonating guitar with resonator conductor Oct. 2, 2012
8222503 Sound reverberator device for detachable connection to the strings of a string musical instrument Jul. 17, 2012
8217254 Digital instrument with physical resonator Jul. 10, 2012
8067685 Stringed instrument utilizing sympathetic vibrations Nov. 29, 2011
7977565 Vibration apparatus and method for seasoning stringed musical instruments Jul. 12, 2011
7928303 Insert for cajon drum Apr. 19, 2011
7915505 Musical instrument Mar. 29, 2011
7842867 Internally-mounted soundhole interfacing device Nov. 30, 2010
7754951 String instrument having a rear chamber with a flanged sound projection vent Jul. 13, 2010
7678987 Apparatus and method for vibrating stringed musical instruments Mar. 16, 2010
7557282 Hardtail converter block for a tremolo equipped guitar Jul. 7, 2009
7514615 Stringed musical instrument having a hybrid arch-top and flat-top soundboard Apr. 7, 2009
7482519 Stringed musical instrument Jan. 27, 2009
7425671 Compact stringed musical instrument Sep. 16, 2008
7301085 Stringed musical instrument having harmonic bridge Nov. 27, 2007
7259318 Magnetic pickup device for a stringed musical instrument with large free shape low impedance coil for noise cancelation Aug. 21, 2007
7259308 Acoustic guitar resonator Aug. 21, 2007
7164072 Brace bar for sound board of guitar Jan. 16, 2007
7145064 Acoustic amplifier and tone controller for stringed musical instruments Dec. 5, 2006
7115803 Stringed instrument Oct. 3, 2006
7074992 Soundhole insert for a stringed instrument Jul. 11, 2006
6977329 Apparatus and methods for increasing the tonal complexity and quality of live and recorded musical instruments Dec. 20, 2005
6894209 Guitar having a partially sloped sounding board May. 17, 2005
6861581 Acoustic guitar resonator Mar. 1, 2005
6822147 Arrangement of a sound hole and construction of a sound board in an acoustic guitar Nov. 23, 2004
6800797 Method and apparatus for producing acoustical guitar sounds using an electric guitar Oct. 5, 2004
6777603 Perforated open volume acoustic resonator Aug. 17, 2004
6596931 Ukelele made from koa and coconut shells Jul. 22, 2003
6563033 Stringed musical instrument with apparatus enhancing low frequency sounds May. 13, 2003
6426454 Stringed musical instruments and method therefor Jul. 30, 2002
6369305 Guitar bridge Apr. 9, 2002
6156960 Stringed musical instrument combination Dec. 5, 2000
6127611 Apparatus and method of optimizing the tonal balance of instruments with end-pins Oct. 3, 2000
6103961 Stringed musical instrument Aug. 15, 2000
6087568 Acoustically tailored, composite material stringed instrument Jul. 11, 2000
6046392 Stringed musical instrument frame having interchangeable soundboard and neck assembly Apr. 4, 2000
6040510 Acoustic stringed instrument enhancement device Mar. 21, 2000
6031164 Mute acoustic stringed musical instrument having damping bridge Feb. 29, 2000
5998712 Stringed instrument Dec. 7, 1999
5939652 Tone enhancement device for a musical instrument Aug. 17, 1999
5918298 Tone control for stringed instruments Jun. 29, 1999
5883317 Double-back acoustic booster for stringed instruments Mar. 16, 1999
5854435 Natural resonant speaker Dec. 29, 1998

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