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Patents for Baldwin Coolidge
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
134,381	Dec. 31, 1872	W.P. Hopkins	Work Holders for Lathes	metal lathe accessories and attachments
143,242	Sep. 30, 1873	W.P. Hopkins	Gear Cutting Attachments to Lathes	metal lathe accessories and attachments

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