FR841818A
(en )
1939-05-31
Improvements in metal smelting apparatus and processes
FR755623A
(en )
1933-11-28
Metallurgical processes, apparatus and products
FR674138A
(en )
1930-01-23
Improvements to processes and apparatus for welding metal wires
FR722579A
(en )
1932-03-22
Improvements in processes and apparatus for welding or otherwise joining spaced metal wires
FR765508A
(en )
1934-06-12
Improvements in television processes and apparatus
FR707005A
(en )
1931-07-02
Improvements in welding processes and devices
FR42208E
(en )
1933-06-15
Improvements to processes and apparatus for detecting defects in electrical conductors
FR697098A
(en )
1931-01-12
Improvements in processes and apparatus for the manufacture of wrought or wrought iron
FR630563A
(en )
1927-12-05
Improvement in dyeing processes and apparatus
FR631382A
(en )
1927-12-19
Improvements in electrolysis processes and apparatus
FR37872E
(en )
1931-02-04
Improvements in apparatus and processes for ore concentraton
FR718706A
(en )
1932-01-28
Improvements in methods and apparatus for drawing tubes
FR37243E
(en )
1930-11-03
Improvement in apparatus and processes for the concentration of minerals
FR700938A
(en )
1931-03-09
Improvements in processes and apparatus for electric pipe welding
FR706901A
(en )
1931-07-01
Improvements to processes and apparatus for joining metal cables or for anchoring their ends
FR716232A
(en )
1931-12-17
Improvements in welding processes and equipment
FR715039A
(en )
1931-11-24
Improvements to processes and equipment used for welding and improvements to welded products
FR759294A
(en )
1934-01-31
Improvements in welding processes and welders
FR665945A
(en )
1929-09-25
Improvement in processes and apparatus for heating billets and others
FR726197A
(en )
1932-05-24
Improvement in apparatus and processes for the concentration of ores by flotation
FR689308A
(en )
1930-09-04
Improvements in welding processes and equipment
FR813496A
(en )
1937-06-02
Improvements in processes and equipment for welding metals
FR775189A
(en )
1934-12-21
Improvements in catalytic processes and apparatus for this purpose
FR568182A
(en )
1924-03-18
Improvement in apparatus and processes for the concentration of minerals
FR734290A
(en )
1932-10-19
Improvements in welding processes and equipment