AT198205B
(en )
1958-06-25
Device for disinfecting water by means of ultraviolet radiation
CH342158A
(en )
1959-10-31
Waste container
CH327491A
(en )
1958-01-31
Electro-optical scanning process
CH344379A
(en )
1960-01-31
Process for purifying cloaca water
CH322971A
(en )
1957-07-15
Device for achieving an exchange of substances.
NL88506C
(en )
1958-06-16
Liquid aeration device
CH373476A
(en )
1963-11-30
Device for making x-rays
FR1137268A
(en )
1957-05-27
Apparatus for sanitizing
AT193593B
(en )
1957-11-25
Device for draining water from windows
FR1156232A
(en )
1958-05-13
Filtration apparatus
FR1154502A
(en )
1958-04-11
Settling device
CH341864A
(en )
1959-10-31
Device for generating pulses
CH340197A
(en )
1959-07-31
Process for sterilizing or purifying water
CH313179A
(en )
1956-03-31
Device for treating water with chlorine gas
CH302686A
(en )
1954-10-31
Process for the treatment of water in desalination plants.
AT190206B
(en )
1957-06-25
Device for tanning by spraying
AT191985B
(en )
1957-09-25
Large transformer
FR1136067A
(en )
1957-05-09
Wastewater treatment plant
DK89727C
(en )
1960-09-19
Irradiation apparatus.
AT189336B
(en )
1957-03-25
Radiation device
AT193812B
(en )
1957-12-10
Device for aerating waste water
DK88030C
(en )
1959-10-19
Procedure and facilities for the treatment of waste water from a town or settlement.
AT199569B
(en )
1958-09-10
Process for the treatment of water by means of phosphates containing silicates
ES47069Y
(en )
1956-02-16
Water sterilization apparatus
ES61261Y
(en )
1958-01-16
Apparatus for water treatment