4. Prime-mover dynamo plants
  5. Electric control
  6. Engine control

W. E. Ducanson, Jr.

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Brushless doubly-fed generator control system

Prime-mover dynamo plants – Electric control – Engine control
Patent

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Control system for a variable speed hydro-power plant apparatus

Prime-mover dynamo plants – Electric control – Engine control
Patent

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Signaling system

Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent

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