CA464880A
(fr )
1950-05-02
Systeme de signaux
CA466511A
(fr )
1950-07-11
Systeme de typotelegraphe
CA462716A
(fr )
1950-01-24
Systeme telegraphique
CA462915A
(fr )
1950-01-31
Systeme telegraphique
CA467172A
(fr )
1950-08-08
Appareils de typotelegraphes
CA462844A
(fr )
1950-01-31
Systeme de teleautographe
CA456580A
(fr )
1949-05-10
Systeme de typotelegraphe
CA463348A
(fr )
1950-02-21
Systeme telegraphique a canalisation divisee
CA462225A
(fr )
1950-01-03
Systeme de communication
CA462526A
(fr )
1950-01-17
Systeme de communication
CA462889A
(fr )
1950-01-31
Systeme de communication
CA463584A
(fr )
1950-03-07
Systeme de communication
CA464502A
(fr )
1950-04-18
Systeme de communication
CA466168A
(fr )
1950-06-27
Systeme de communication
CA464738A
(fr )
1950-05-02
Systeme telegraphique auto-compensateur
CA465042A
(fr )
1950-05-16
Systeme de teleautographie
CA464209A
(fr )
1950-04-04
Systeme de signaux pour teleautographe
CA468640A
(fr )
1950-10-10
Teletypes
CA462277A
(fr )
1950-01-03
Mecanisme de synchronisation pour systeme telegraphique
CA442804A
(fr )
1947-07-08
Systeme de typotelegraphe
CA442968A
(fr )
1947-07-15
Systeme de typotelegraphe
CA442969A
(fr )
1947-07-15
Systeme de typotelegraphe
CA462530A
(fr )
1950-01-17
Systeme de signalisation
CA462914A
(fr )
1950-01-31
Systeme de signalisation
CA465728A
(fr )
1950-06-06
Systeme de signalisation