CA514094A
(fr )
1955-06-28
Systemes telephoniques employant des commutateurs non numeriques
CA580092A
(fr )
1959-07-21
Systemes de commutateur
CA512519A
(fr )
1955-05-03
Systemes de telephone a postes groupes
CA510190A
(fr )
1955-02-15
Systemes telephoniques
CA510665A
(fr )
1955-03-08
Systemes telephoniques
CA512309A
(fr )
1955-04-26
Systemes telephoniques
CA512310A
(fr )
1955-04-26
Systemes telephoniques
CA512311A
(fr )
1955-04-26
Systemes telephoniques
CA512312A
(fr )
1955-04-26
Systemes telephoniques
CA519014A
(fr )
1955-11-29
Systemes telephoniques
CA511747A
(fr )
1955-04-12
Systemes telephoniques
CA512083A
(fr )
1955-04-19
Systemes telephoniques
CA506632A
(fr )
1954-10-19
Systemes de manoeuvre de telecommunications
CA509711A
(fr )
1955-02-01
Systemes de manoeuvre
CA499023A
(fr )
1954-01-05
Systemes de manoeuvre
AU210218B2
(en )
1956-05-03
Signalling on telephone systems
CA525830A
(fr )
1956-06-05
Systemes de manoeuvre de central de telephone
CA512075A
(fr )
1955-04-19
Systemes selectifs d'appels
CA521394A
(fr )
1956-01-31
Systemes de telephone
CA521856A
(fr )
1956-02-14
Systemes de telephone
CA522332A
(fr )
1956-03-06
Systemes de telephone
CA524594A
(fr )
1956-05-01
Systemes de telephone
CA524631A
(fr )
1956-05-01
Systemes de telephone
CA525662A
(fr )
1956-05-29
Systemes telephoniques
CA530739A
(fr )
1956-09-25
Systemes telephoniques