DK44558C
(en )
1931-09-07
Circuit device for automatic telephone systems.
DK41644C
(en )
1930-02-17
Device for 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.
DK45876C
(en )
1932-07-04
Circuit arrangement for automatic telephone systems.
DK45941C
(en )
1932-07-18
Circuit arrangement for automatic telephone systems.
GR1383B
(en )
1926-12-31
AUTOMATIC TELEPHONE SYSTEMS.
DK42695C
(en )
1930-08-04
Selector device for automatic Telephone systems.
DK41455C
(en )
1930-01-13
Device by Telephone Systems.
DK43009C
(en )
1930-09-22
Device by Telephone Systems.
DK43996C
(en )
1931-04-13
Circuit arrangement for automatic telephone systems.
GR1446B
(en )
1927-03-09
AUTOMATIC TELEPHONE SYSTEM.
DK45217C
(en )
1932-02-08
Circuit arrangement for an automatic telephone system.
DK39916C
(en )
1929-03-18
Device for automatic and semi-automatic Telephone Systems.
DK45974C
(en )
1932-07-25
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK45983C
(en )
1932-07-25
Circuit arrangement for fully or semi-automatic Telephone Systems.
DK35360C
(en )
1925-12-07
Automatic Telephone System.
DK41793C
(en )
1930-03-10
Selector for automatic Telephone Systems.
ES99048A1
(en )
1926-11-01
Improvements in automatic telephone systems.
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.
AT105745B
(en )
1927-02-25
Automatic telephone switchboard.
DK45839C
(en )
1932-06-20
Circuit device for a Telephone system.
AT121482B
(en )
1931-02-25
Circuit arrangement for telephone systems.