All Patents in class 84/254


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All Patents in class 84/254
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	5,189X	Aug. 14, 1828	J. Mackay	Fitting hammer heads for piano fortes
	RX-8	Apr. 18, 1839	J. Mackay	Improvement in Mode of Fitting the Hammer-Heads of Piano-Fortes