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DE544304C
|
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Automatic control of driving switches
|
|
GB329433A
|
|
System for the automatic operation of the controllers of electric traction outfits
|
|
DE535840C
|
|
Automatic control of driving switches
|
|
GB302793A
|
|
Reflector for short hertzian waves
|
|
GB290333A
|
|
Signalising device for the transmission and reception of signals even in foggy weather or at night between two vessels or between a vessel and land
|
|
GB271161A
|
|
Direct current rotary transformers with arbitrarily variable subdivision of pressure
|
|
GB271162A
|
|
Direct current rotary transformers with arbitrarily variable subdivision of pressure
|
|
GB232812A
|
|
Direct current rotary transformers with arbitrarily variable subdivision of pressure
|
|
GB235282A
|
|
Systems of charging and discharging storage batteries
|
|
GB196893A
|
|
Improvements in and relating to direct current rotary transformers
|
|
GB172969A
|
|
Direct current rotary transformers with arbitrarily variable subdivision of pressure
|
|
DE371894C
|
|
Single or multi-phase autotransformer
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