CH4142A
(en )
1892-03-15
Purifier and separator of sewage, domestic and industrial water
CH4814A
(en )
1892-08-15
Device for the purification and filtering of industrial and domestic water
FR341908A
(en )
1904-08-23
Water filtration system
FR388306A
(en )
1908-08-08
Apparatus for industrial water purification
FR325957A
(en )
1903-05-13
Improvements made to water purification devices
FR321408A
(en )
1903-01-09
Water purifier
FR373830A
(en )
1907-05-28
industrial water purification
FR329988A
(en )
1903-08-10
Domestic water filter
FR379925A
(en )
1907-11-22
Boiler water purification system
FR397774A
(en )
1909-05-17
Method and apparatus for softening and purifying natural or polluted water intended primarily for supplying steam boilers and for industrial purposes
FR394216A
(en )
1909-01-18
Chemical and automatic industrial water purifier
FR366991A
(en )
1906-10-17
Device for the filtration and purification of industrial or food water
FR332109A
(en )
1903-10-16
Water purification installation
FR335979A
(en )
1904-02-22
Process for the purification and sterilization of drinking water and waste water
CH443A
(en )
1889-03-25
Steam boiler feed water purifier system and others
FR7319E
(en )
1907-07-06
Wastewater purification
CH31204A
(en )
1905-03-15
Water purifier
FR366974A
(en )
1906-10-17
Device for the bacterial purification of drainage products, as well as household and waste water
FR348840A
(en )
1905-04-27
Water purification process
FR7288E
(en )
1907-06-19
Chemical process for water purification
FR474060A
(en )
1915-02-05
Improvements to water clarification and purification devices, mainly polluted water or sewage
FR474E
(en )
1903-01-17
Steam boiler feedwater purifier
FR348186A
(en )
1905-04-04
Application of waste heat recovery from boilers
FR334505A
(en )
1903-12-23
Water purifier
FR368868A
(en )
1906-12-19
Method and apparatus for industrial water purification