CH65742A
(en )
1914-07-16
Device for purifying waste water
CH64943A
(en )
1914-05-16
Continuous process and device for purifying waste water
CH57833A
(en )
1913-02-01
Device for regulating water turbines
CH67764A
(en )
1915-01-02
Device for collecting floating matter from sewage
CH64477A
(en )
1914-04-01
Process for purifying hydrogen
AT57779B
(en )
1913-02-25
Waste water purifier.
CH66913A
(en )
1914-10-16
Device for making surface patterns
CH59849A
(en )
1913-06-02
Device for collecting waste while eating
CH68452A
(en )
1915-03-16
Device for water heating
CH66434A
(en )
1914-09-01
Device for preparing emulsions
FR468763A
(en )
1914-07-16
Device for the purification of waste water
CH73580A
(en )
1916-10-16
Equipment for the mechanical treatment of waste water in sewage treatment plants
CH52119A
(en )
1911-11-01
Settling basin for clarifying waste water
CH67553A
(en )
1914-12-16
Device to prevent boiling liquids from boiling over
CH63406A
(en )
1914-04-16
Device for attaching hoses to pipes
CH66461A
(en )
1914-09-16
Device for cleaning pipes
FR471879A
(en )
1914-11-13
Water purification system
CH61444A
(en )
1913-09-16
Device for making impressions
CH27228A
(en )
1903-12-15
Device for cleaning waste water
CH66530A
(en )
1914-09-16
Device for determining the efficiency of the transmission of motor vehicles
CH63170A
(en )
1914-01-16
Device for the automatic taking of samples
CH73661A
(en )
1916-11-01
Device for the production of concrete steps
CH69538A
(en )
1915-07-01
Device for pushing up water
CH67702A
(en )
1915-01-16
Process for processing the gas water in small gas works
CH50918A
(en )
1911-07-17
Box to hold waste for promenades