AT132279B
(en )
1933-03-10
Circuit arrangement for automatic or semi-automatic telephone exchanges.
AT113265B
(en )
1929-05-25
Circuit arrangement for fully automatic telephone exchanges.
AT112310B
(en )
1929-02-25
Circuit arrangement for call seekers in automatic telephone exchanges.
CH149577A
(en )
1931-09-15
Subscriber set for fully automatic telephone systems.
AT126865B
(en )
1932-02-25
Circuit arrangement for automatic telephone systems.
AT121382B
(en )
1931-02-25
Telephone exchange voters.
AT140129B
(en )
1935-01-10
Circuit arrangement for voters in telephone systems.
AT121486B
(en )
1931-02-25
Circuit arrangement for coin operated telephones in telephone systems with dialer operation.
GR2347B
(en )
1929-06-24
IMPROVEMENTS IN AUTOMATIC OR SEMI-AUTOMATIC TELEPHONE SYSTEMS.
AT126814B
(en )
1932-02-10
Circuit arrangement for automatic and semi-automatic telephone systems.
AT109597B
(en )
1928-05-10
Line selector for automatic telephone exchanges.
AT109102B
(en )
1928-03-26
Self-hooking telephone exchanges voters.
CH153049A
(en )
1932-02-29
Circuit arrangement in telephone systems.
CH138456A
(en )
1930-02-28
Selector switch for telephone systems.
DK44998C
(en )
1931-12-14
Circuit arrangement for a fully or semi-automatic Telephone System.
ES112398A1
(en )
1929-10-01
Improvements in automatic or semiautomatic telephone systems.
ES94412A1
(en )
1925-11-01
Improvements in automatic telephone systems.
ES93788A1
(en )
1925-07-16
Improvements in automatic telephone systems in general.
GB243140A
(en )
1925-11-26
Improvements in automatic telephone systems
ES93021A1
(en )
1925-06-16
Improvements in automatic or semi-automatic telephone systems.
ES92192A1
(en )
1925-04-16
Improvements in automatic or semi-automatic telephone systems.
AT129580B
(en )
1932-08-25
Circuit arrangement for establishing connections in automatic or semi-automatic telephone systems.
GR2353B
(en )
1929-07-04
IMPROVEMENTS IN SWITCH ARRANGEMENTS BY AUTOMATIC OR SEMI-AUTOMATIC TELEPHONE SYSTEMS.
ES93024A1
(en )
1925-06-16
Improvements in automatic telephone systems.
ES113359A1
(en )
1929-10-16
Improvements in the switching arrangements for automatic or semi-automatic telephone station systems.