CH73580A
(en )
1916-10-16
Equipment for the mechanical treatment of waste water in sewage treatment plants
AT75537B
(en )
1919-02-25
Method and device for the mechanical clarification of waste water in sewage treatment plants.
GB100465A
(en )
1916-05-25
Improvements in Devices for the Mechanical Purification or Straining of Water and other Liquids.
CH74201A
(en )
1917-02-01
Device for preventing the backflow of sewage in buildings
AT89386B
(en )
1922-09-11
Filtration and sewage treatment plant.
CH65742A
(en )
1914-07-16
Device for purifying waste water
CH79129A
(en )
1918-10-01
Sewage treatment plant for the process water of hydropower plants and other liquids containing sink matter
FR478669A
(en )
1915-12-28
Sewage treatment plant
CH79431A
(en )
1918-11-16
Sewage treatment plant for the process water of hydropower plants or other liquids containing sink matter
CH61934A
(en )
1913-10-16
Wastewater treatment plant
CH64715A
(en )
1914-04-16
Plant for the mechanical cleaning of wastewater using digestion and separation processes
CH57833A
(en )
1913-02-01
Device for regulating water turbines
CH74735A
(en )
1917-09-17
Washing method and equipment for carrying out the same
FR412634A
(en )
1910-07-18
Water purifier
CA170749A
(en )
1916-07-11
Purification of water, liquid and sewage
FR483551A
(en )
1917-07-20
Purification tank for sewage and wastewater
CH79432A
(en )
1918-11-16
Sewage treatment plant for the process water of hydropower plants or other liquids containing sink matter
CH52119A
(en )
1911-11-01
Settling basin for clarifying waste water
FR457224A
(en )
1913-09-13
Water purifier
AT57779B
(en )
1913-02-25
Waste water purifier.
CH62593A
(en )
1913-12-01
Biological sewage treatment plant
CH61696A
(en )
1913-10-16
Apparatus for the electrolysis of water
CH63782A
(en )
1914-02-16
Device for the production of artificial building blocks
CH72155A
(en )
1916-04-01
Process for the production of briquettes from urban waste and bones
CH73661A
(en )
1916-11-01
Device for the production of concrete steps