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US2144575A
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Electric motor control
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GB490926A
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Improved method of control for electric vehicles, lifts, cranes and the like
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GB327916A
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An improved apparatus for indicating the depth of liquids
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US1811801A
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Apparatus for indicating the depth of liquids in tanks or other containers
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GB295305A
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Improvements relating to apparatus for indicating the depth of liquids in tanks or other containers
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GB285640A
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Improvements relating to instruments for measuring the depth of liquids
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GB285552A
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Improvements in apparatus for indicating the depth of liquid in, or displaced by, a vessel or in a channel of any kind conveying liquids
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GB248137A
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Improvements relating to the control of motor vehicles such as warehouse trucks and the like
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GB232425A
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Improvements relating to electrically driven invalid chairs and like vehicles
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US1670207A
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Apparatus for indicating the depth of liquids
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GB217306A
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Improved plate construction for electric accumulator cells
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GB213310A
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Improved means for application of power plants comprising two or more combined power units
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GB209898A
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Improvements relating to control gear for motor driven vehicles
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GB200011A
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Improvements in apparatus for indicating the depth of liquids
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GB159055A
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Improved method of variable pressure control for circuits operated from batteries and other multiple unit sources
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US1368187A
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Apparatus for indicating the depth of liquid in vessels
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