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US2663553A
|
|
Dissolving apparatus
|
|
US2619114A
|
|
Gas flow control apparatus
|
|
US2508987A
|
|
Slurry feeding apparatus
|
|
US2541742A
|
|
Dry feeder
|
|
US2473986A
|
|
Water purification unit
|
|
US2423172A
|
|
Backwashing means for filtering apparatus by reverse flow of filtrate
|
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US2381802A
|
|
Dry chemical feeder
|
|
US2352767A
|
|
Diffuser-circulator
|
|
US2289334A
|
|
Manufacture of fusible plugs
|
|
US2289333A
|
|
Hydraulic motor and control apparatus
|
|
US2289589A
|
|
Treatment of aqueous liquids with halogens
|
|
US2269393A
|
|
Procedure and apparatus for controlling the treatment of flowing material
|
|
US2289332A
|
|
Liquid feeding apparatus
|
|
US2229038A
|
|
Liquid feeding apparatus
|
|
US1510132A
|
|
Process of producing nitrogen trichloride
|
|
US1665239A
|
|
Carburetor
|
|
US1514939A
|
|
Chlorinator
|
|
US1413154A
|
|
Process of bleaching paper and fabrics
|
|
US1413153A
|
|
Method of sterilizing water and sewage
|
|
US1403993A
|
|
Process of manufacturing hypochlorite solutions
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