CH123215A
(en )
1927-11-16
Device for operating an electrical switch.
AT108631B
(en )
1928-01-25
Device for interrupting an electrical current.
CH100155A
(en )
1923-07-16
Device for singeing yarns of all kinds by means of electric current.
AT105749B
(en )
1927-02-25
Device for determining the location of a fault in electrical power networks.
CH157152A
(en )
1932-09-15
Device for switching strong electrical alternating currents.
ES87530A1
(en )
1924-01-01
Protection device for electrical installations.
ES89687A1
(en )
1924-09-01
An electrical warning device.
DK34278C
(en )
1925-03-16
Device for sockets for electrical sockets.
ES88135A3
(en )
1924-04-01
An astatic comparator device for electric currents.
ES98374A1
(en )
1926-09-01
An electrical device for calls, notices, announcements.
ES99294A1
(en )
1926-11-01
A device for interrupting an electrical current.
AT99339B
(en )
1925-02-25
Device for stereoscopy.
ES97049A2
(en )
1926-07-16
An electrical contact device.
ES96955A1
(en )
1926-05-16
An electrical contact device.
DK35384C
(en )
1925-12-14
Electrical Advertising Apparatus.
ES91784A2
(en )
1925-06-01
Protection device for electrical installations.
DK33340C
(en )
1924-06-10
Device by electrolytic Apparatus.
CA223176A
(en )
1922-08-29
Carbon removing device
DK45572C
(en )
1932-04-25
Device for electrical socket plugs.
AT126914B
(en )
1932-02-25
Device for extinguishing high voltage arcs.
ES82100A3
(en )
1922-12-16
A transformer apparatus for electric current.
DK38159C
(en )
1927-11-21
Electric Welding Apparatus.
ES87110A1
(en )
1923-12-01
Improved device for electrical replacement indicator panels.
CA228628A
(en )
1923-02-06
Electrical indicating device
ES90054A1
(en )
1924-10-16
A plug for electrical currents.