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Class Information
Number: 84/169
Name: Music > Instruments > Automatic > Indicators
Description: Indicators of various kinds connected to automatic instruments.

Patents under this class:

Patent Number Title Of Patent Date Issued
7608774 Performance guide apparatus and program Oct. 27, 2009
7528311 Keyboard-type percussion instrument May. 5, 2009
6777604 Insertable musical keyboard device with moving inserts to detect key movement Aug. 17, 2004
6433673 Digital enunciator, process and communication system employing same Aug. 13, 2002
4484180 Switch condition indicator Nov. 20, 1984

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