CH291949A
(en )
1953-07-15
Circuit for telephone systems for receiving signals.
CH288899A
(en )
1953-02-15
Telephone cash desk.
CH297628A
(en )
1954-03-31
Subscriber circuit for call seekers.
CH302752A
(en )
1954-10-31
Circuit arrangement for telephone systems with main and sub-offices.
CH298635A
(en )
1954-05-15
Electrochemical facility.
CH316570A
(en )
1956-10-15
Telephone system with main and sub-offices
CH288628A
(en )
1953-01-31
Sailing facility.
CH299543A
(en )
1954-06-15
Impulse contact for dials and impulse devices.
CH315749A
(en )
1956-08-31
Circuit arrangement for subscriber telephone station
AT173486B
(en )
1952-12-27
Circuit arrangement in telephone systems with group dialers
CH309049A
(en )
1955-08-15
Circuit arrangement in telephone systems with main and sub-offices.
CH302751A
(en )
1954-10-31
Circuit arrangement for telephone systems with community connections.
CH304562A
(en )
1955-01-15
Housings for telephone sets.
AT174089B
(en )
1953-02-25
Circuit arrangement for telephone systems with sub-exchanges
CH295211A
(en )
1953-12-15
Ribbon cables for telephone systems.
CH302753A
(en )
1954-10-31
Test and blocking circuit for voters in telecommunications systems
AT170194B
(en )
1952-01-25
Circuit arrangement for sub-exchanges in telephone systems with dialer operation
AT173488B
(en )
1952-12-27
Circuit arrangement for sub-exchanges in telephone systems with dialer operation
AT174090B
(en )
1953-02-25
Circuit arrangement for telephone systems with direct dialing
CH320152A
(en )
1957-03-15
Circuit arrangement with reversing device for telecommunications systems
AT185410B
(en )
1956-04-25
Circuit arrangement for telephone extension systems with dialer operation
DK80633C
(en )
1956-03-05
Telephone system.
DK80055C
(en )
1955-10-31
Telephone system.
AT171124B
(en )
1952-04-25
Circuit arrangement for transmissions, in particular for alternating current transmissions in telecommunications systems
AT188765B
(en )
1957-02-11
Circuit arrangement for telephone systems with two-way connections