DK38212C
(en )
1927-12-05
Electrical Contact Device, especially useful in automatic Telephone Systems.
SU4488A1
(en )
1928-01-31
Telephone device
CH135864A
(en )
1929-10-15
Electrical contact device.
ES97051A1
(en )
1926-04-16
Improvements in automatic telephone systems.
ES96955A1
(en )
1926-05-16
An electrical contact device.
ES97049A2
(en )
1926-07-16
An electrical contact device.
ES94412A1
(en )
1925-11-01
Improvements in automatic telephone systems.
ES93024A1
(en )
1925-06-16
Improvements in automatic telephone systems.
ES93788A1
(en )
1925-07-16
Improvements in automatic telephone systems in general.
ES88873A1
(en )
1924-04-16
Improvements in telephone receiving devices.
ES90141A1
(en )
1924-10-16
Improvements in electrical call devices.
DK43223C
(en )
1930-10-20
Circuit Arrangement for Use in Telephone Systems.
DK46024C
(en )
1932-08-08
Electrical Contact, especially for Starters in Automobiles.
ES102975A2
(en )
1927-08-01
An electrical contact device.
GR1383B
(en )
1926-12-31
AUTOMATIC TELEPHONE SYSTEMS.
DK45359C
(en )
1932-03-07
Circuit Device for Automatic Telephone Systems.
DK46657C
(en )
1932-12-19
Circuit device 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.
DK44558C
(en )
1931-09-07
Circuit device for automatic telephone systems.
AT108963B
(en )
1928-02-25
Circuit arrangement for telephone systems in series connection.
DK38287C
(en )
1927-12-27
Electrical Element, especially for Use in Batteries for Radio Use.
GR1446B
(en )
1927-03-09
AUTOMATIC TELEPHONE SYSTEM.
GR1312B
(en )
1926-12-16
PERFECTIONS IN AUTOMATIC PHONE SYSTEMS.
ES99049A1
(en )
1926-11-01
Improvements in telephone systems.