CH69554A
(en )
1915-11-16
Device for the protection of electrical installations against overvoltages
CH69553A
(en )
1915-11-16
Device for the protection of electrical installations against overvoltages
CH70040A
(en )
1916-01-03
Protection device for electrical installations
FR480107A
(en )
1916-06-22
Device for protecting electrical installations against overvoltages
CH53329A
(en )
1912-02-16
Device to protect electrical installations against overvoltage
FR470462A
(en )
1914-09-12
Safety device for electrical installations
FR499019A
(en )
1920-01-29
Protection device for electrical installations
CH74277A
(en )
1917-06-16
Protection device for electrical installations
FR455916A
(en )
1913-08-12
Device for the protection of electrical circuits against overvoltages and other similar disturbances
FR19985E
(en )
1915-12-30
Device for protecting transformer coils against overvoltage
FR502156A
(en )
1920-05-06
Surge protection device
FR467722A
(en )
1914-06-19
Device for tree protection
FR468661A
(en )
1914-07-11
Device for protecting transformer coils against overvoltage
FR454554A
(en )
1913-07-08
Tree protection device
CA160339A
(en )
1915-02-02
Electrical protection device
FR456464A
(en )
1913-08-27
Protection device for electrical circuits
FR498874A
(en )
1920-01-24
Device for protecting electrical installations against voltage surges
FR476851A
(en )
1915-09-07
Protective device for the ears
CH69407A
(en )
1915-06-16
Protective device for the ears
CA161734A
(en )
1915-04-06
Electrical protective device
CA158938A
(en )
1914-11-17
Electrical protective device
FR448264A
(en )
1913-01-27
System for protecting electrical installations against overvoltages
FR478410A
(en )
1915-12-10
Surge protection system for electrical installations
CH74676A
(en )
1917-04-02
Protective device for electrical devices
CH69104A
(en )
1915-06-01
Train protection device