DK101991C
(en )
1965-06-21
Control equipment for carrier telephone systems.
NL189226B
(en )
TELECOMMUNICATIONS SYSTEM.
DK90291C
(en )
1961-01-23
Control equipment for carrier telephone systems.
DK84189C
(en )
1958-01-06
Selector equipment for telecommunications systems.
CH346248A
(en )
1960-05-15
Telephone system
DK89109C
(en )
1960-06-07
Amplifier for telephone systems.
DK86825C
(en )
1959-02-02
Telephone system.
DK107952C
(en )
1967-07-24
Automatic telephone system.
DK95773C
(en )
1963-04-22
Conversation device for local telephone systems.
AT197444B
(en )
1958-04-25
Amplifier device for telephone systems.
DK86996C
(en )
1959-03-09
Electrical communication system.
DK87756C
(en )
1959-08-31
Automatic telephone system.
DK87335C
(en )
1959-05-25
Systems for automatic telephone exchanges.
CH336452A
(en )
1959-02-28
Multi-channel carrier telephone system
DK103948C
(en )
1966-03-14
Automatic telecommunication system.
DK86527C
(en )
1958-11-17
Device for automatic telecommunication systems.
DK85230C
(en )
1958-03-17
Separation or test list for telephone systems.
IE22205L
(en )
1956-11-06
Telephone signalling systems.
CA501719A
(en )
1954-04-20
Control apparatus for telephone systems
DK85381C
(en )
1958-04-14
Electroplating systems.
DK88467C
(en )
1960-02-01
Monitoring connection to telecommunication systems.
DK82528C
(en )
1957-04-23
Vent valve for sprinkler system.
CA501321A
(en )
1954-04-06
Telephone systems
CA507617A
(en )
1954-11-23
Telephone systems
CA506411A
(en )
1954-10-12
Telephone systems