FR644261A
(en )
1928-10-05
Advanced rheostat designed specifically for wireless telephony and telegraphy
FR635782A
(en )
1928-03-24
Improvements in telegraphy and wireless telephony devices
FR647204A
(en )
1928-11-21
Improvements in telegraphy and wireless telephony
FR659974A
(en )
1929-07-05
Improvements in the assembly of wireless telephony and telegraphy stations
FR644260A
(en )
1928-10-05
Contactor more particularly applicable to wireless telephony and telegraphy
FR640044A
(en )
1928-07-04
Improvements in wireless telephony and telegraphy stations
FR638781A
(en )
1928-06-02
Improvements in wireless telephony and telegraphy receiving stations
FR649921A
(en )
1928-12-29
Portable receiver for wireless telegraphy and telephony
FR626987A
(en )
1927-09-23
Reducing dial applicable to wireless telegraphy
FR619632A
(en )
1927-04-06
Switch particularly applicable in wireless telephony and telegraphy
FR622255A
(en )
1927-05-27
Choke coil more particularly applicable to wireless telephony and telegraphy
FR564230A
(en )
1923-12-24
Rheostat particularly applicable to telegraphy and wireless telephony
FR649685A
(en )
1928-12-26
Improvements to telegraphy and wireless telephony receivers
FR595761A
(en )
1925-10-09
Improvements in high frequency electrical transmission systems
FR649874A
(en )
1928-12-28
Improvements to transmitters for telegraphy and wireless telephony
ES103411A1
(en )
1927-08-01
Improvements in wireless telegraphy and telephony devices.
FR682106A
(en )
1930-05-23
Improvements in telegraphy and wireless telephony devices
FR38314E
(en )
1931-05-12
Improvements to telegraphy and wireless telephony transmitters
FR639813A
(en )
1928-06-30
Aerial improvements for telegraphy and wireless telephony
FR647251A
(en )
1928-11-22
Guillotine window
FR634734A
(en )
1928-02-24
Improvements to mandrels intended for the manufacture of coils used more particularly in wireless telephony and telegraphy
ES100825A1
(en )
1927-06-16
Procedure and device for the manufacture of glazed ceramic plates.
FR642680A
(en )
1928-09-01
Improvements to electronic tubes used in telegraphy and wireless telephony and to electronic valves
FR657655A
(en )
1929-05-25
Protective device for lamps used in wireless telegraphy and telephony
FR611547A
(en )
1926-09-30
Galena wireless telephone set