CH160296A
(en )
1933-02-28
Device for illuminating the dial on telephone sets.
CH158085A
(en )
1932-10-31
Device for checking the coins inserted in self-collecting telephone stations.
CH160303A
(en )
1933-02-28
Illuminated circuit device.
DK51617C
(en )
1936-05-11
Telephone Alarm Device.
DK46277C
(en )
1932-10-03
Telephone set.
ES121927A1
(en )
1931-05-01
An alarm device.
DK45009C
(en )
1931-12-21
Measuring device for party games.
CA291078A
(en )
1929-07-09
Telephone illuminating device
ES691Y
(en )
1932-04-16
Watch with illuminated dial.
DK46505C
(en )
1932-11-21
Device for Operating Telephone Interconnection Centers.
ES127982A1
(en )
1933-01-01
An advertising device.
DK45289C
(en )
1932-02-22
Device for Determining the Duration of Telephone Calls.
DK47989C
(en )
1933-11-06
Automatic Telephone System.
ES126157A3
(en )
1932-05-01
Removable electrical connection device.
ES124683A1
(en )
1931-12-16
Self-recording photocampmeter apparatus.
GR3495B
(en )
1932-01-21
PHOTO-SIGNALING INSTRUMENT.
ES125207A1
(en )
1932-02-01
An electric lighting device.
CH212745A
(en )
1940-12-15
Circuit for call transmission.
CH210952A
(en )
1940-08-15
Device for making flycatchers.
DK46898C
(en )
1933-02-06
Carrying device.
CH152944A
(en )
1932-02-29
Device on clockworks.
ES119673A1
(en )
1930-10-16
An automatic signaling device.
CH114125A
(en )
1926-03-16
Display device for shooting ranges.
DK46037C
(en )
1932-08-08
Advertising device.
ES118473A1
(en )
1930-07-01
Removable electrical connection device.