AT136562B
(en )
1934-02-26
Device for automatic testing of the permissibility of the operation of switching devices.
CH139030A
(en )
1930-03-31
Device for converting light into current or voltage changes.
CH122103A
(en )
1927-09-01
Device for transmitting vibrations.
CH122785A
(en )
1927-10-01
Serving board with holding device.
AT104641B
(en )
1926-11-10
Device for atomizing fuels.
CH127386A
(en )
1928-09-01
Device for reducing the tripping time of automatic electrical switches.
FR730583A
(en )
1932-08-18
Device for maintaining constant the filament-plate quiescent current in amplifier lamps
CH143823A
(en )
1930-11-30
Device for controlling one or more electrical circuits.
CH145542A
(en )
1931-02-28
Circuit device for remote control of switches.
AT108026B
(en )
1927-11-25
Device for automatic switching on and off of electric lamps.
CH109406A
(en )
1925-03-16
Circuit device for actuating block mirror fields.
CH128929A
(en )
1928-11-16
Device for receiving mothballs for the purpose of moth control.
FR33766E
(en )
1929-03-01
Brake linkage control device
FR556878A
(en )
1923-07-28
Automatic advertising device
FR612281A
(en )
1926-10-20
Control device
FR548736A
(en )
1923-01-22
Automatic annunciator device
CH132342A
(en )
1929-04-15
Device on drawing instruments.
FR672785A
(en )
1930-01-07
Device for breaking or switching on an electrical circuit
FR578490A
(en )
1924-09-26
Device for repairing telegraph poles
AT121046B
(en )
1931-01-26
Device for self-ventilation of feed water and the like like
CH138699A
(en )
1930-03-15
Removable electrical connection device.
FR610643A
(en )
1926-09-09
Switching device for t devices. s. f. and similar applications
AT108999B
(en )
1928-02-25
Device for generating tension seeds.
FR617923A
(en )
1927-02-28
Control device for electrical installations
FR707030A
(en )
1931-07-02
Electric current control device