DK43546C
(en )
1930-12-29
Selector for Use in Automatic Telephone Systems.
ES94412A1
(en )
1925-11-01
Improvements in automatic telephone systems.
ES93788A1
(en )
1925-07-16
Improvements in automatic telephone systems in general.
ES93024A1
(en )
1925-06-16
Improvements in automatic telephone systems.
ES97051A1
(en )
1926-04-16
Improvements in automatic telephone systems.
ES92192A1
(en )
1925-04-16
Improvements in automatic or semi-automatic telephone systems.
ES93021A1
(en )
1925-06-16
Improvements in automatic or semi-automatic telephone systems.
GR1378B
(en )
1926-12-31
IMPROVEMENTS IN SEMI-AUTOMATIC TELEPHONE SYSTEMS.
ES99395A1
(en )
1926-11-16
Improvements in automatic or semi-automatic telephone systems.
DK42695C
(en )
1930-08-04
Selector device for automatic Telephone systems.
DK37494C
(en )
1927-05-16
Counter for Use in an Automatic or Semi-Automatic Telephone System.
GR1383B
(en )
1926-12-31
AUTOMATIC TELEPHONE SYSTEMS.
DK41447C
(en )
1930-01-13
End dial for Use in PBX systems.
DK41793C
(en )
1930-03-10
Selector for automatic Telephone Systems.
ES99048A1
(en )
1926-11-01
Improvements in automatic telephone systems.
GR1377B
(en )
1926-12-31
PERFECTIONS IN AUTOMATIC MUTOR FOR TELEPHONE SYSTEMS.
GR1312B
(en )
1926-12-16
PERFECTIONS IN AUTOMATIC PHONE SYSTEMS.
ES96059A1
(en )
1926-04-16
Improvements in automated telephone systems.
DK54546C
(en )
1938-04-04
Selector Brush for Use in Telephone Systems.
DK41152C
(en )
1929-11-25
Selector for fully or semi-automatic Telephone Systems.
ES94764A3
(en )
1925-11-16
Improvements in automated telephone systems.
DK43335C
(en )
1930-11-10
Automatic Selector.
DK43223C
(en )
1930-10-20
Circuit Arrangement for Use in Telephone Systems.
ES97862A1
(en )
1926-07-16
Improvements in or relating to automatic or semi-automatic telephone systems.
GR1446B
(en )
1927-03-09
AUTOMATIC TELEPHONE SYSTEM.