CH45916A
(en )
1910-01-03
Apparatus for the clarification and purification of waste water
CH48232A
(en )
1910-10-01
Process and device for the purification of waste water
CH43743A
(en )
1909-06-16
Apparatus for separating feces into liquid and solid components
CH45493A
(en )
1909-11-16
Device for the separation of the liquid and solid components of waste water
CH43631A
(en )
1909-06-01
Method and apparatus for the production of ozone
GB190807072A
(en )
1908-09-03
Improvements in the Arrangements and Apparatus for the Purification of Sewage or Water.
FR418207A
(en )
1910-12-03
Apparatus for purifying sewage matter Apparatus for purifying sewage and sewage and sewage
FR12825E
(en )
1910-11-26
Apparatus for purifying faecal water
FR396606A
(en )
1909-04-16
Apparatus for purifying faecal water
CH39848A
(en )
1908-05-01
Apparatus for the treatment of aerated liquids
CA96376A
(en )
1905-12-05
Method of and apparatus for purifying water
FR356762A
(en )
1905-12-08
Method and apparatus for purifying water
AT75537B
(en )
1919-02-25
Method and device for the mechanical clarification of waste water in sewage treatment plants.
FR351152A
(en )
1905-07-05
Apparatus for cutting and separating the constituent elements of waste rubber
CH41586A
(en )
1908-11-02
Apparatus for the manufacture of calcium carbide
CH35507A
(en )
1906-08-31
Apparatus for the destruction of faeces and the purification of waste water
FR394277A
(en )
1909-01-19
Method and apparatus for the treatment of sewage
FR397669A
(en )
1909-05-14
Method and apparatus for water purification
CH64943A
(en )
1914-05-16
Continuous process and device for purifying waste water
CH42180A
(en )
1909-01-02
Apparatus for displaying ozone
CH32116A
(en )
1905-06-30
Apparatus for the economical preparation and storage of hot water
CH52119A
(en )
1911-11-01
Settling basin for clarifying waste water
CA87562A
(en )
1904-05-31
Water purifying apparatus
CA87563A
(en )
1904-05-31
Water purifying apparatus
ES42764A1
(en )
1908-04-01
An apparatus for the biological purification of fecal matter, sewage water and the like.