AT121482B
(en )
1931-02-25
Circuit arrangement for telephone systems.
ES89606A1
(en )
1924-08-16
Improvements in telephone systems.
ES91218A3
(en )
1924-12-01
Improvements in telephone systems.
DK45439C
(en )
1932-03-21
Circuit arrangement for fully or semi-automatic Telephone systems.
DK45941C
(en )
1932-07-18
Circuit arrangement for automatic telephone systems.
DK44998C
(en )
1931-12-14
Circuit arrangement for a fully or semi-automatic Telephone System.
ES95103A3
(en )
1926-02-16
Improvements in telephone systems.
DK44187C
(en )
1931-06-01
Automatic Telephone System.
ES99049A1
(en )
1926-11-01
Improvements in telephone systems.
ES92395A1
(en )
1925-05-16
Improvements in telephone systems.
ES93082A1
(en )
1925-06-16
Improvements in telephone systems.
ES94381A3
(en )
1925-12-16
Improvements in telephone systems.
ES94945A3
(en )
1925-12-16
Improvements in telephone systems.
ES95859A1
(en )
1926-03-01
Improvements in telephone systems.
ES95932A1
(en )
1926-03-01
Improvements in telephone systems.
ES95958A1
(en )
1926-02-16
Improvements in telephone systems.
ES96167A1
(en )
1926-06-01
Improvements in telephone systems.
ES96305A1
(en )
1926-03-16
Improvements in telephone systems.
ES96310A1
(en )
1926-04-16
Improvements in telephone systems.
ES96357A1
(en )
1926-03-16
Improvements in telephone systems.
DK45876C
(en )
1932-07-04
Circuit arrangement for automatic telephone systems.
DK42593C
(en )
1930-07-14
Telephone system.
DK43103C
(en )
1930-10-06
Telephone system.
DK44006C
(en )
1931-04-13
Telephone system.
DK45984C
(en )
1932-07-25
Circuit arrangement for fully or semi-automatic Telephone Systems.