CA386744A
(fr )
1940-02-06
Methode a sceller les formations a teneur d'eau
CA386200A
(fr )
1940-01-09
Procede a sceller les strates aquiferes
CA391687A
(fr )
1940-10-01
Methode de conversion du petrole
CA391198A
(fr )
1940-09-10
Sceau portant etiquette
CA389534A
(fr )
1940-06-25
Sceau
CA389626A
(fr )
1940-06-25
Sceau
CA393384A
(fr )
1940-12-24
Garniture a huile
CA393393A
(fr )
1940-12-24
Methode de graissage
CA387888A
(fr )
1940-04-09
Sceau hydraulique
CA391764A
(fr )
1940-10-08
Garniture de coussinet
CA388091A
(fr )
1940-04-16
Garniture d'arbre de couche
CA392605A
(fr )
1940-11-19
Methode de recuperation du fluide de puits
AU114055B2
(en )
1941-10-30
Improvements in oil seals
CA388215A
(fr )
1940-04-23
Plaquage galvanique
CA389888A
(fr )
1940-07-09
Sceau a fluide
CA389890A
(fr )
1940-07-09
Sceau a fluide
AU112581B2
(en )
1941-03-06
Improved water tap
CA391250A
(fr )
1940-09-10
Coussinet
CA393455A
(fr )
1940-12-31
Coussinet
CA390750A
(fr )
1940-08-20
Garniture a liquide d'arbre de couche
CA388220A
(fr )
1940-04-23
Garniture etanche
CA392895A
(fr )
1940-12-03
Methode de forage de puits
CA388033A
(fr )
1940-04-16
Pompe hydraulique
CA386680A
(fr )
1940-02-06
Methode a concasser
AU114382B2
(en )
1941-12-24
Glass-to-metal seals