DK31460C
(en )
1923-03-26
Device for systems for protection of electrical systems against overcurrent.
DK31097C
(en )
1923-01-08
Automatic electrical switch for overvoltage protection devices.
ES78850A1
(en )
1921-10-01
Improvements in protection devices for electrical systems.
FR510907A
(en )
1920-12-14
Protection device for electrical pipes
FR534414A
(en )
1922-03-25
Device for protecting electrical networks against overvoltages
DK37983C
(en )
1927-09-26
Electrical Relay Combination for Control or Regulation of Devices or for Protection against Incoming Faults.
FR609968A
(en )
1926-08-27
Circuit breaker for the protection of electrical installations
DK33109C
(en )
1924-04-22
Device for repeated switching on of automatic circuit breakers.
DK27342C
(en )
1921-03-21
Three-phase Ferraris relay for protection of electrical systems.
FR552714A
(en )
1923-05-05
Electrical protection systems
AT96095B
(en )
1924-02-25
Surge protection device for multi-phase systems.
CH98906A
(en )
1923-04-16
Electrical surge protection.
FR535788A
(en )
1922-04-21
Circuit breaker
DK48503C
(en )
1934-03-12
Device for Protection of Electrical Installations against Insulation Faults.
DK36672C
(en )
1926-10-18
Procedure for Protecting Transformers from Internal Faults.
DK33216C
(en )
1924-05-19
Procedure for Pupinizing High Frequency Telephone Cables.
DK34579C
(en )
1925-06-02
Device for protection against loss of carriage stick.
DK29929C
(en )
1922-07-17
Procedure for Manufacturing Ignition Rates.
FR26193E
(en )
1923-09-05
Ultra-fast circuit breaker
DK28214C
(en )
1921-08-22
Multiple fuse protection.
FR548350A
(en )
1923-01-12
Electrical surge protection device
DK26966C
(en )
1920-11-29
Sleeve or funnel-like lead-through means for protecting wires.
DK33278C
(en )
1924-05-26
Device for Elimination of Earth Power Disorders by Telegraphy through Cables.
DK31468C
(en )
1923-03-26
Electrical Temperature Protection.
FR544093A
(en )
1922-09-14
Plug circuit breaker