All Patents in class 33/20.1


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All Patents in class 33/20.1
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
657X	Feb. 05, 1806	C. Thompson	Delineating Machine for Copying Charts, Etc.	copying apparatus
657	Mar. 26, 1838	S.G. Merriman, R. Dickinson	Friction Rollers	bearings and rollers