CA376214A
(fr )
1938-09-06
Purification de soufre elementaire
CA375075A
(fr )
1938-07-12
Recuperation du soufre
CA375074A
(fr )
1938-07-12
Recuperation du soufre
CA373215A
(fr )
1938-04-19
Production de soufre
CA374660A
(fr )
1938-06-28
Production de soufre
CA374659A
(fr )
1938-06-28
Production de soufre
CA378260A
(fr )
1938-12-13
Production de soufre
CA373216A
(fr )
1938-04-19
Production de soufre
CA374658A
(fr )
1938-06-28
Production de soufre
CA376670A
(fr )
1938-09-20
Accordeon
CA371295A
(fr )
1938-01-18
Purification de sulfate d'aminophenol
CA372342A
(fr )
1938-03-08
Purification de gaz
CA378243A
(fr )
1938-12-13
Purification de gaz
CA377829A
(fr )
1938-11-22
Purification du chlore
CA378461A
(fr )
1938-12-20
Etai de mine
CA373186A
(fr )
1938-04-19
Moissonneuse-batteuse
CA373588A
(fr )
1938-05-03
Flan photographique
CA375883A
(fr )
1938-08-16
Fusee-turbine
CA374410A
(fr )
1938-06-14
Defecateur
CA373724A
(fr )
1938-05-10
Petrin
CA375577A
(fr )
1938-08-02
Piano-violon
CA374408A
(fr )
1938-06-14
Photosculpture
CA374530A
(fr )
1938-06-21
Plaque a poncer
CA374662A
(fr )
1938-06-28
Dibenzoxacarbocyanine
CA377050A
(fr )
1938-10-11
Arsenobenzene-mono-sulfoxylate