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US680992A
|
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Apparatus for purifying water.
|
|
US671131A
|
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Grease-extracting apparatus.
|
|
GB190010012A
|
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Improvements in Apparatus for Liberating Greasy Matters from Liquids and other Substances.
|
|
US636497A
|
|
Apparatus for purifying waste water.
|
|
GB189900555A
|
|
Improvements in the Method of and Means for Purifying Waste and Impure Waters, particularly such Waters as Contain Greasy Matters.
|
|
US633688A
|
|
Apparatus for purifying washwaters from wool.
|
|
GB189620561A
|
|
Improvements in Machines for Combing Wool.
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