CH30008A
(en )
1904-10-31
Installation for purifying sewage and other waste water
CH16605A
(en )
1898-12-31
Installation for the purification of black water or sewage
FR2316E
(en )
1904-03-03
Installation for water purification
FR8798E
(en )
1908-06-23
New arrangement of purification and clarification basins, with oxidation, for sanitation of feed water or waste water
FR350264A
(en )
1905-12-18
bacteriological water purification
FR328576A
(en )
1903-07-16
Clarifying basin for water purification devices
FR335850A
(en )
1904-02-15
water purifier
FR350327A
(en )
1906-01-12
Clarifier for drinking and industrial water
FR340451A
(en )
1904-07-07
Composition to purify sea water
FR335979A
(en )
1904-02-22
Process for the purification and sterilization of drinking water and waste water
CH31341A
(en )
1905-03-31
Installation for water clarification
CH35507A
(en )
1906-08-31
Apparatus for the destruction of faeces and the purification of waste water
FR327968A
(en )
1903-07-07
Water purifier system
FR353130A
(en )
1905-09-04
water purifier
FR359424A
(en )
1906-03-26
Hygienic device for the automatic destruction of faeces and the purification of waste water
FR345966A
(en )
1904-12-24
Device for water purification
FR350277A
(en )
1905-12-18
System and apparatus for the evacuation and purification of wastewater and excreta in a city
FR358461A
(en )
1906-02-17
Apparatus for the reception and liquefaction of faeces and the purification of waste water
CH28481A
(en )
1904-04-30
Installation for storing water
FR361332A
(en )
1906-06-15
Process for the purification and sterilization of drinking water and waste water
FR344174A
(en )
1904-10-26
Water clarification
FR383266A
(en )
1908-03-02
Installation for industrial water purification
FR372371A
(en )
1907-04-04
Process for the clarification and purification of waste water from iron mines
FR7644E
(en )
1907-09-17
New urban sanitation system
CH42891A
(en )
1909-03-01
Installation for water purification