CH80288A
(en )
1919-02-17
Safety device on the oil box of electrical transformers and apparatus
FR498182A
(en )
1919-12-31
Transportable lifting gantry
CH78568A
(en )
1918-08-01
Transportable sawing device
CH79406A
(en )
1919-04-01
Device for cooling air and oil transformers
CH79724A
(en )
1919-02-17
Locking device on box switches
ES66170A2
(en )
1918-02-16
An electrical voltage safety device.
CH76024A
(en )
1917-10-16
Device for cooling the vacuum vessels of mercury vapor rectifiers and similar electrical steam devices
DK25884C
(en )
1920-04-26
Hanging and collecting box for electric chandeliers.
CH79673A
(en )
1919-05-01
Electrical measuring device
CH79564A
(en )
1919-04-16
Device to improve the cooling of electromagnet and transformer windings
CH80452A
(en )
1919-07-16
Device for adjusting the ignition moment in electrical ignition devices
FR495659A
(en )
1919-10-15
AC current limiter
CH82864A
(en )
1919-11-01
Device for rectifying high and low frequency alternating currents
FR506289A
(en )
1920-08-18
ejector-thruster and electric generator
FR494038A
(en )
1919-08-28
Fuse for electrical installations
DK22914C
(en )
1918-03-18
Branch box for electric crowns and the like.
CH79299A
(en )
1919-04-01
Safety locking device
CH83427A
(en )
1919-12-01
Safety locking device
CH81853A
(en )
1919-12-01
Safety and alarm device for doors
CH77599A
(en )
1918-05-01
Device for fastening bushing insulators in oil switch covers
CA188957A
(en )
1919-03-04
Gopher destroying device
CH80902A
(en )
1919-04-16
Device for facilitating the tying of packages and the like
CH80405A
(en )
1919-03-01
Explosive device
CH78596A
(en )
1918-08-01
Safety device for electric heaters
FR495667A
(en )
1919-10-15
Devices for switches and switches