CH50963A
(en )
1911-07-17
Installation for sewage treatment
FR478669A
(en )
1915-12-28
Sewage treatment plant
CH68997A
(en )
1915-05-17
Installation for sewage treatment
CH53179A
(en )
1912-02-01
Installation for sewage treatment
FR468763A
(en )
1914-07-16
Device for the purification of waste water
FR440526A
(en )
1912-07-12
Automatic shutter of the back retention for sewage pipes
FR18182E
(en )
1914-02-21
Improvements to the bottling of mineral waters
FR481747A
(en )
1917-01-09
Installation for the incineration of household waste
FR457073A
(en )
1913-09-11
Device for sewage treatment
FR471879A
(en )
1914-11-13
Water purification system
FR477567A
(en )
1915-10-28
Installation for the evacuation and treatment of waste
CH65550A
(en )
1914-08-01
Water purification device
FR483551A
(en )
1917-07-20
Purification tank for sewage and wastewater
FR475960A
(en )
1915-06-29
Anti-waste valve for water distribution
FR517706A
(en )
1921-05-10
Improvements to installations for the clarification of residual water
FR477203A
(en )
1915-10-06
Rational settling tank for the clarification of wastewater from washhouses, with extractor-compressor of the retained sludge
FR17530E
(en )
1913-10-02
Water purification device
FR471079A
(en )
1914-10-13
Water purifier
FR434124A
(en )
1912-01-25
General installation for the purification of wastewater, eliminating unpleasant exhalations from wastewater treatment plants
FR455968A
(en )
1913-08-13
Device for water purification
CH76940A
(en )
1918-02-16
Installation for electrolysis
CH76941A
(en )
1918-02-16
Installation for electrolysis
FR433883A
(en )
1912-01-18
Improvements in sewage treatment
FR426646A
(en )
1911-07-11
Device for the purification of waste water
FR447168A
(en )
1912-12-26
Sewage treatment device