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Patents for Thwaites Bros., Ltd.
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
44,892Nov. 01, 1864P.H. RootsImprovement in blower-casesblowers
56,614Jul. 24, 1866P.H. Roots, F.M. RootsImprovement in cross-heads for blowersblowers
RE2,369Oct. 02, 1866P.H. RootsImprovement in blowersblowers
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