CH214354A
(en )
1941-04-15
Electrical apparatus.
CH227178A
(en )
1943-05-31
Device for multiplying factors which correspond to electrical voltages and other quantities.
CH231804A
(en )
1944-04-15
Device for scanning films.
CH225170A
(en )
1943-01-15
Device for attaching templates to duplicators.
CH209016A
(en )
1940-03-15
AC switch.
AT156066B
(en )
1939-05-10
Device for converting direct current into alternating current.
AT155592B
(en )
1939-02-25
Device for converting direct current into periodically variable current.
CH207016A
(en )
1939-09-15
Device for converting direct voltage into alternating voltage.
CH218508A
(en )
1941-12-15
Lighting system.
CH210557A
(en )
1940-07-31
Device for making briquettes from waste paper.
FR835441A
(en )
1938-12-21
Modulation system
CH214269A
(en )
1941-04-15
Copper-copper oxide rectifier.
CH240131A
(en )
1945-11-30
Procedure for turning off alternating current.
FR834848A
(en )
1938-12-02
Advanced electrolytic device
AT155580B
(en )
1939-02-25
Device for converting electrical currents.
CH226557A
(en )
1943-04-15
Device for frequency multiplication.
CH199081A
(en )
1938-07-31
Funicular.
AT144720B
(en )
1936-02-25
Device for indexing musical works.
CH206463A
(en )
1939-08-15
Send arrangement to achieve course lines.
FR847914A
(en )
1939-10-19
Receiving apparatus of t. s. f.
FR841090A
(en )
1939-05-10
Receiving apparatus of t. s. f.
FR832926A
(en )
1938-10-06
Current rectifier
CH205643A
(en )
1939-06-30
Device for automatic voltage regulation in alternating current networks.
ES143909A1
(en )
1937-12-16
An improved fixation device.
AT105627B
(en )
1927-02-25
Device for converting single-phase current into direct current.