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All Patents in class 137/625.3
Patents 1 - 4 of 4
First set of recordsLast set of records
7,755Nov. 05, 1850J. Judson, A. JudsonValve for governorssteam engine governors
2,211,646Aug. 13, 1940L.A. ColeValve
2,314,827Mar. 23, 1943R.M. HortvetProcess for extracting pure nitrogen from air
2,912,011Nov. 10, 1959F.G. BurgValve structuredrill presses
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