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High-voltage winding for core-form power transformers

Inductor devices – With means to change coil length or connections – Series change
Patent

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Landscape lighting transformer having increased loading...

Inductor devices – With means to change coil length or connections – Series change
Reexamination Certificate

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Method and apparatus for providing selectable output voltages

Inductor devices – With means to change coil length or connections – Series change
Reexamination Certificate

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Method and apparatus for providing selectable output voltages

Inductor devices – With means to change coil length or connections – Series change
Reissue Patent

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No-load tap changer for three-phase transformers

Inductor devices – With means to change coil length or connections – Series change
Patent

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On-load tap-changing transformer

Inductor devices – With means to change coil length or connections – Series change
Patent

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System for coupling external leads to a multitap transformer

Inductor devices – With means to change coil length or connections – Series change
Patent

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Three winding transformer

Inductor devices – With means to change coil length or connections – Series change
Patent

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Transformers of large capacity for ultra-high voltages

Inductor devices – With means to change coil length or connections – Series change
Patent

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