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Patents for Thwaites Bros., Ltd.
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	44,892	Nov. 01, 1864	P.H. Roots	Improvement in blower-cases
	56,614	Jul. 24, 1866	F.M. Roots, P.H. Roots	Improvement in cross-heads for blowers
	RE2,369	Oct. 02, 1866	P.H. Roots	Improvement in blowers

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