CH79255A
(en )
1918-10-16
Protection device against overvoltages in electrical systems
FR495211A
(en )
1919-10-02
Improvements to lightning arresters or similar devices
CH89137A
(en )
1921-05-02
Procedure for protecting electrical systems against overvoltages.
CH76022A
(en )
1917-10-16
Surge protection device
DK23302C
(en )
1918-07-29
Electrical Voltage Protection.
CH76745A
(en )
1918-02-01
Overvoltage protection device based on corona action
CH80452A
(en )
1919-07-16
Device for adjusting the ignition moment in electrical ignition devices
CH39308A
(en )
1908-02-17
Protection device against harmful overvoltages in electrical systems
DK28131C
(en )
1921-08-01
Screw and nut protection.
ES79671A1
(en )
1922-01-16
Protection against overvoltages in high voltage installations.
CH70053A
(en )
1915-08-16
Hearing protection device
CH63677A
(en )
1914-02-16
Protective device on above-ground electrical lines with several conductors
ES67253A1
(en )
1918-07-16
Improvements in electrical installations.
FR482909A
(en )
1917-05-11
Electrical protection device
ES65761A1
(en )
1917-12-16
Surge protection device based on the effect of the corona.
DK23510C
(en )
1918-09-16
Electrical Thermal Protection.
ES174813A1
(en )
1946-10-16
IMPROVEMENTS IN THE PROTECTION OF APPARATUS AGAINST OVERVOLTAGES AND THE LIKE.
FR495022A
(en )
1919-09-26
Explosion protection
CH71257A
(en )
1915-12-16
Device for automatically limiting the current to electrical appliances
FR584405A
(en )
1925-02-06
Device for protecting electrical installations against surges
FR548515A
(en )
1923-01-17
Device for protecting low voltage electrical installations against overvoltages
CH77574A
(en )
1918-05-01
Holding and protection device on moulders
CH81842A
(en )
1919-12-01
Installation on high-voltage coils, in particular on ignition devices for explosion motors for protection against breakdown due to overvoltage
CH71075A
(en )
1916-03-01
Protection against pipe bursts on mechanical time fuses
CH82693A
(en )
1919-10-16
Device to prevent flashovers on electrical machines