FR576733A
(en )
1924-08-25
Improvements to cutting or agitating devices
FR548402A
(en )
1923-01-15
Improvements to machines or apparatus for crushing or reducing minerals, ores and other materials
FR560932A
(en )
1923-10-12
Advanced training at crushing mills
FR689042A
(en )
1930-09-01
Improvements to equipment for crushing ores and other materials
FR583999A
(en )
1925-01-27
Improvements to machines for processing ores or other materials
FR625064A
(en )
1927-08-02
Improvements to apparatus for classifying minerals
FR598870A
(en )
1925-12-28
Improvements in apparatus and devices for conveying materials to scales, crushers and other machines
FR580956A
(en )
1924-11-20
Machine for crushing and pulverizing friable substances
FR577050A
(en )
1924-08-29
Improvements to grinding, refining and mixing machines
FR546979A
(en )
1922-11-28
Improvements made to ore crushing machines
FR614119A
(en )
1926-12-07
Improvements to apparatus for separating or draining ores or other granular materials
FR625654A
(en )
1927-08-17
Improvements to nut crushing machines
FR569004A
(en )
1924-04-05
Advanced machine for pulverizing or crushing coal and other materials
FR578121A
(en )
1924-09-18
Improvements to grinding machines
FR658892A
(en )
1929-06-21
Improvements to grinding or grinding machines
FR622164A
(en )
1927-05-24
Improvements in machines for the hot treatment of ores or similar materials
FR530929A
(en )
1922-01-04
Further training in file grinding machines
FR562561A
(en )
1923-11-14
Improvements in mineral concentration
FR568182A
(en )
1924-03-18
Improvement in apparatus and processes for the concentration of minerals
FR570616A
(en )
1924-05-05
Improvements to machines for polishing sheet materials
FR577029A
(en )
1924-08-29
Improvements to machines for crushing ores containing precious metals
FR625028A
(en )
1927-08-01
Improvement in coal or other material crushing devices
FR644919A
(en )
1928-10-16
Improvements to machines for measuring the surfaces of leathers, skins, and other sheet materials
FR564310A
(en )
1923-12-27
Improvements to hydraulic devices for breaking rocks and other materials
FR591610A
(en )
1925-07-11
Improvements to hydrating, grinding and refining machines