Patents Granted on 1813-07-15


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Patents Granted on 1813-07-15
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
1,967X	Jul. 15, 1813	A. Stowell	Machine for finishing heads of screws
1,968X	Jul. 15, 1813	A. Brewster	Die work as a substitute for etching