CH4261A
(en )
1892-03-31
Rotating filter apparatus for pre-filtration of water with automatic removal of impurities from the same
CH25311A
(en )
1903-04-30
Apparatus for filtering liquids
CH27228A
(en )
1903-12-15
Device for cleaning waste water
AT68040B
(en )
1915-02-25
Filters for clarifying contaminated water.
FR335363A
(en )
1904-01-22
Filter apparatus for water holding suspended solids
CH37494A
(en )
1907-06-15
Apparatus for filtering liquids
FR485752A
(en )
1918-02-06
Process for the separation of solids of different densities
CH24005A
(en )
1902-10-31
Device for the automatic release of lens shutters
FR364362A
(en )
1906-08-21
Method and apparatus for separating solids from greywater
CH67249A
(en )
1914-11-16
Process and apparatus for the continuous distillation of acidic liquids
CH53393A
(en )
1912-02-16
Method of dewatering sludge
CH77544A
(en )
1918-05-01
Apparatus for separating and recovering fat and oils from sewage
FR375098A
(en )
1907-06-29
Method and apparatus for filtering liquids
CH60980A
(en )
1913-09-01
Process for the fractional separation and dewatering of suspended matter
CH81451A
(en )
1919-06-16
Process for processing lignocellulosic materials
CH83285A
(en )
1919-11-17
Apparatus for preventing liquids from boiling over
CH65742A
(en )
1914-07-16
Device for purifying waste water
FR486522A
(en )
1918-04-10
Method and apparatus for separating liquids from solids
CH72924A
(en )
1916-07-17
Method and apparatus for mixing sludge
FR493399A
(en )
1919-08-07
Process for separating suspended matter from liquids
CH66514A
(en )
1914-09-16
Method and apparatus for treating water for the purpose of preventing scale formation
CH68076A
(en )
1915-02-16
Automatic device for changing the number of revolutions of work machines
CH81780A
(en )
1919-07-16
Process for cleaning machine oils
AT82801B
(en )
1921-02-25
Method and device for the dialytic separation of colloids and crystalloids.
CH7218A
(en )
1894-02-15
Apparatus for purifying sewer water