GR1078B
(en )
1925-12-22
PERFECTIONS IN OR IN RELATION TO PHONOGRAPHIC DEVICE AND WIRELESS SPEAKERS.
GR963B
(en )
1925-07-10
PERFECTIONS IN AND IN RELATION TO AIR CONDITIONERS.
ES90140A1
(en )
1924-10-16
Improvements in radiotelegraphy and radiotelephony.
ES94474A1
(en )
1925-11-01
Improvements in phonographs.
ES93650A1
(en )
1925-07-16
Improvements in amplifying devices.
GR1381B
(en )
1926-12-31
IMPROVEMENTS IN AND RELATED TO TELEPHONE SYSTEMS.
ES95927A1
(en )
1926-03-01
Improvements in speakers.
ES94489A1
(en )
1926-01-16
Improvements in loudspeaker devices.
GR686B
(en )
1924-07-25
PERFECTIONS IN AND IN RELATION TO INCREASE OVER CASE DISPOSAL.
ES94177A1
(en )
1925-10-16
Improvements in diaphragms for tape recorders and other acoustic devices.
ES94178A1
(en )
1925-10-16
Improvements in diaphragms for tape recorders and other acoustic devices.
GR1648B
(en )
1927-10-22
IMPROVEMENTS IN WIRELESS TELEPHONE AND TELEPHONE.
GR1204B
(en )
1926-06-12
PHONOGRAPH DISC AND HOW TO MAKE THEM.
GR1279B
(en )
1926-09-20
IMPROVEMENTS IN AND IN RELATION TO CINEMA MOVIE OR SIMILARITY.
ES92789A1
(en )
1925-06-01
Improvements in microphones.
ES92111A1
(en )
1925-04-16
Improvements in radio-receivers.
ES93199A1
(en )
1925-06-16
Improvements in radio-receivers.
ES93200A1
(en )
1925-06-16
Improvements in radio-receivers.
GR811B
(en )
1925-01-26
WOOD CARBORATOR OF WOOD AND LYGNITE.
GR1150B
(en )
1926-03-26
PERFECTIONS IN CARBURATORS
ES91153A1
(en )
1924-12-01
Improvements in speakers.
GR1088B
(en )
1925-12-31
PERFECTIONS IN CARS.
DK34844C
(en )
1925-08-10
Grønsvær and Grundforeler.
ES99108A1
(en )
1926-11-01
Improvements in sound devices for sound recorders and reproducers.
ES100203A3
(en )
1927-01-16
Improvements in gramophones and similar talking machines.