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All Patents in class 137/169
Patents 1 - 2 of 2
First set of recordsLast set of records
6,252XNov. 17, 1830J.S. WilliamsMode of supplying water for boilers for steam enginesstationary boilers
22,284Dec. 14, 1858J. FrickFeed-water and blow-off apparatus for steam-boilersstationary boilers
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