AT126861B
(en )
1932-02-25
Installation on automatic telephone systems.
DK45941C
(en )
1932-07-18
Circuit arrangement for automatic telephone systems.
CH138148A
(en )
1930-02-15
Telephone installation.
GR1448B
(en )
1927-10-20
AUTOMATIC TELEPHONE SYSTEM.
GR1611B
(en )
1927-09-26
AUTOMATIC TELEPHONE SYSTEM.
GR1700B
(en )
1928-01-02
AUTOMATIC TELEPHONE SYSTEM.
GR1383B
(en )
1926-12-31
AUTOMATIC TELEPHONE SYSTEMS.
DK46657C
(en )
1932-12-19
Circuit device for automatic Telephone Systems.
DK45359C
(en )
1932-03-07
Circuit Device for Automatic Telephone Systems.
DK41793C
(en )
1930-03-10
Selector for automatic Telephone Systems.
DK45876C
(en )
1932-07-04
Circuit arrangement for automatic telephone systems.
ES105733A1
(en )
1928-06-01
Telephone installation.
CH127133A
(en )
1928-08-16
Telephone installation.
GR1446B
(en )
1927-03-09
AUTOMATIC TELEPHONE SYSTEM.
ES105732A1
(en )
1928-06-01
Telephone installation for collective connection.
DK35360C
(en )
1925-12-07
Automatic Telephone System.
DK44187C
(en )
1931-06-01
Automatic Telephone System.
DK45091C
(en )
1932-01-11
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK46162C
(en )
1932-09-05
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK46766C
(en )
1933-01-16
Circuit arrangement for fully or semi-automatic Telephone Systems.
AT126865B
(en )
1932-02-25
Circuit arrangement for automatic telephone systems.
DK43996C
(en )
1931-04-13
Circuit arrangement for automatic telephone systems.
AT126867B
(en )
1932-02-25
Automatic telephone system.
DK45217C
(en )
1932-02-08
Circuit arrangement for an automatic telephone system.
ES88484A1
(en )
1924-04-16
A telephone system.