CA404386A
(fr )
1942-04-28
Methode a canneler les fenetres
CA408856A
(fr )
1942-11-24
Cannelure de fenetre
CA405812A
(fr )
1942-06-30
Fenetre
CA403002A
(fr )
1942-02-24
Fenetre
CA404015A
(fr )
1942-04-14
Fenetre
CA404171A
(fr )
1942-04-21
Fenetre
CA404612A
(fr )
1942-05-12
Fenetre
CA402353A
(fr )
1942-01-20
Fenetre double
CA407746A
(fr )
1942-09-29
Methode de pyrolyse
CA403151A
(fr )
1942-03-03
Cadre de fenetre
CA407540A
(fr )
1942-09-22
Methode a cimenter les puits
CA408731A
(fr )
1942-11-17
Coupe-froid
CA403157A
(fr )
1942-03-03
Coupe-froid
CA403520A
(fr )
1942-03-17
Coupe-froid
CA408217A
(fr )
1942-10-27
Coupe-froid
AU116293B2
(en )
1943-01-14
Ablack-out curtain
CA407536A
(fr )
1942-09-22
Methode a traiter les puits
CA407537A
(fr )
1942-09-22
Methode a traiter les puits
CA407539A
(fr )
1942-09-22
Methode a traiter les puits
CA407541A
(fr )
1942-09-22
Methode a traiter les puits
CA407542A
(fr )
1942-09-22
Methode a traiter les puits
CA408387A
(fr )
1942-11-03
Methode a traiter les puits
CA408388A
(fr )
1942-11-03
Methode a traiter les puits
CA408390A
(fr )
1942-11-03
Methode a traiter les puits
CA407090A
(fr )
1942-09-01
Methode de blanchiment