FR749636A
(en )
1933-07-26
Method and device for preventing electrolysis in ship hulls
FR820389A
(en )
1937-11-09
Method and device for hammer stretching
FR707779A
(en )
1931-07-15
Method and device for the recovery of gold contained in seawater
FR732738A
(en )
1932-09-24
Method and device for operating sludge rot chambers
FR817110A
(en )
1937-08-26
Method and device for extracting water from air in the vapor state
FR756066A
(en )
1933-12-04
Method and device for promoting the production of crystals in saturators
FR723750A
(en )
1932-04-14
Method and device for hydraulic wiping of windows
FR710504A
(en )
1931-08-24
Method and device for recovering the oil contained in aqueous emulsions
FR648151A
(en )
1928-12-06
Method and device for obtaining yeasts
FR745955A
(en )
1933-05-20
Device facilitating the entry and exit of vessels in the basins
FR704804A
(en )
1931-05-27
Method and device for the purification of waste water
FR672383A
(en )
1929-12-27
Method and device for sterilizing water
FR777784A
(en )
1935-02-28
Method and device for establishing joints in concrete roads
FR597869A
(en )
1925-12-01
Method and device for advertising or the like on water
FR553340A
(en )
1923-05-22
Method and device for giving the illusion of speech to characters, in cinematographic projections
FR711565A
(en )
1931-09-12
Method and device for preventing sediment deposits in solid form, and corrosion, in vessels containing water
FR778034A
(en )
1935-03-07
Method and device for carrying out work below water level
FR791688A
(en )
1935-12-14
Method and device for solidifying or cooling liquids and in particular water
FR715802A
(en )
1931-12-10
Improved method and apparatus for the electrolytic decomposition of water
FR690569A
(en )
1930-09-23
Process and device for the extraction of vegetable juices or latex
FR644691A
(en )
1928-10-12
Method and device for the concentration of nitrogen acid
FR47992E
(en )
1937-08-28
Method and device for water softening
FR737466A
(en )
1932-12-12
Method and device for water softening
FR679801A
(en )
1930-04-17
Device for the production of carbonated water and the like
FR660250A
(en )
1929-07-09
Water filtration well and method for establishing it