CH86471A
(en )
1920-09-01
Device for protecting networks provided with earthing reactors against resonance voltages.
CH145480A
(en )
1931-02-28
Device for tempering electrical time detonators with two oppositely connected capacitors as ignition current carriers.
CH155808A
(en )
1932-07-15
Device for protecting armor plates, etc.
CH89137A
(en )
1921-05-02
Procedure for protecting electrical systems against overvoltages.
CH97738A
(en )
1923-02-01
Device for the protection of subdivided line networks.
CH85235A
(en )
1920-10-01
Device for drawing circles.
AT88449B
(en )
1922-05-10
Device for degassing and gasifying fuels.
ES68807A1
(en )
1919-04-01
High voltage electrical insulator.
AT91065B
(en )
1923-01-25
High voltage clamp.
CH82864A
(en )
1919-11-01
Device for rectifying high and low frequency alternating currents
ES69530A1
(en )
1919-05-16
Improvements in military equipment.
CH79727A
(en )
1919-01-02
Automatically acting device for switching gas, liquid or electrical lines on or off
CH83496A
(en )
1919-12-01
Device for gathering fabrics etc.
CH168547A
(en )
1934-04-15
Device for protecting electrical installations against insulation faults.
FR513128A
(en )
1921-02-08
Advanced English key
CH83486A
(en )
1919-12-01
Device on barrels for fastening taps
DK24940C
(en )
1919-09-01
Acetylene generator.
DK24736C
(en )
1919-07-14
Acetylene generator.
DK31099C
(en )
1923-01-08
Device for Suspending the Plates in Electric Accumulators.
AT88450B
(en )
1922-05-10
Device for degassing and gasifying fuels.
FI7854A
(en )
1919-12-12
Homogenization equipment
CA207839A
(en )
1921-01-25
Apparatus for treating liquids with gases
DK26766C
(en )
1920-10-18
Electrical Voltage Indicator.
ES70046A1
(en )
1919-07-16
High voltage direct current machine.
ES77409A1
(en )
1921-05-16
An electrical device for the electro-chemical treatment of vapors and gases.