CH79432A
(en )
1918-11-16
Sewage treatment plant for the process water of hydropower plants or other liquids containing sink matter
CH79129A
(en )
1918-10-01
Sewage treatment plant for the process water of hydropower plants and other liquids containing sink matter
FR855849A
(en )
1940-05-21
Process for the purification and deoxygenation of industrial water
CH75317A
(en )
1917-07-16
Sewage treatment plant for process water from hydropower plants
CH82209A
(en )
1919-09-01
Sewage treatment plant for liquids containing sink matter with automatic removal of the separated matter
CH73580A
(en )
1916-10-16
Equipment for the mechanical treatment of waste water in sewage treatment plants
FR833184A
(en )
1938-10-13
Waste water settling tank
CH81665A
(en )
1919-07-01
water tap
ES52374A1
(en )
1912-05-01
Improvements related to the treatment of raw water.
ES65533A1
(en )
1917-11-01
Improvements related to the treatment of water, sewage and similar waters.
FR585998A
(en )
1925-03-12
Process for the industrial use of inferior plants
CH61934A
(en )
1913-10-16
Wastewater treatment plant
CH79651A
(en )
1918-12-16
Facility for the production of calcium carbide
DK24974C
(en )
1919-09-08
Bacterial wastewater treatment plant.
FR766455A
(en )
1934-06-28
Industrial application of lead sub-acetate to the treatment of waste water from fruit distilleries
CH62593A
(en )
1913-12-01
Biological sewage treatment plant
CA170749A
(en )
1916-07-11
Purification of water, liquid and sewage
CH75850A
(en )
1917-10-01
Water accumulation system for hydropower plants
CH195961A
(en )
1938-02-28
Wastewater supply channel for large central sewage treatment plants
FR503022A
(en )
1920-06-01
Water or steam tap
FR488433A
(en )
1918-10-08
Improvements to automatic water purifiers
FR718658A
(en )
1932-01-27
Plant for the treatment of waste water from dairies or other similar applications
FR844790A
(en )
1939-08-01
Process for the complete purification of waste water (cidrasses) from apple distillery
AT89527B
(en )
1922-09-25
Impeller for water turbines or centrifugal pumps for inelastic liquids.
CH341173A
(en )
1959-09-30
Process for the treatment of feed water for steam boilers