CH31279A
(en )
1905-03-31
Cistern arranged for the purification of faeces and greywater, by means of bacteria
FR2316E
(en )
1904-03-03
Installation for water purification
FR349569A
(en )
1905-06-03
Feeder, driver, water purifier
FR478669A
(en )
1915-12-28
Sewage treatment plant
FR410217A
(en )
1910-05-14
Device for the biological purification of wastewater, sewage, sewage and others
FR342634A
(en )
1904-09-13
Pressure regulator for water pipes
CH53179A
(en )
1912-02-01
Installation for sewage treatment
FR483551A
(en )
1917-07-20
Purification tank for sewage and wastewater
CH31580A
(en )
1905-04-30
Tube for electro-roasting
FR350264A
(en )
1905-12-18
bacteriological water purification
FR344377A
(en )
1904-11-03
feed water purifier
CH31341A
(en )
1905-03-31
Installation for water clarification
FR477203A
(en )
1915-10-06
Rational settling tank for the clarification of wastewater from washhouses, with extractor-compressor of the retained sludge
FR354944A
(en )
1905-10-18
Automatic device for water improvement
FR383947A
(en )
1908-03-24
Process for the biological purification of waste water by means of oxidizing substances
FR378690A
(en )
1907-10-12
Intermittent automatic water dispenser for biological sewage treatment
CA87562A
(en )
1904-05-31
Water purifying apparatus
CA87563A
(en )
1904-05-31
Water purifying apparatus
FR475427A
(en )
1915-05-12
New established system for the biological treatment of waste, waste or domestic water
CA87534A
(en )
1904-05-31
Water purification
FR355304A
(en )
1905-10-28
New arrangement for the consolidation of aquifers by means of lime milk or cement
FR357679A
(en )
1906-01-09
Apparatus for purifying water by electricity
CA85825A
(en )
1904-03-08
Water purifier
FR344419A
(en )
1904-11-04
Discharge valve for water pipes
FR350200A
(en )
1905-11-16
Method for purifying ortho-nitrotoluene