LandOfFree - US Patents - Listing for Electric power conversion systems,Frequency conversion without intermediate conversion to d.c.

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DC to AC electric power converting apparatus

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter

Patent

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Delta-connected circulating current cycloconverter apparatus

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter

Patent

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Device for quasi-direct pulse-width controlled energy...

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter

Reexamination Certificate

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Digital gate pulse generator for cycloconverter control

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter

Patent

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Digitally-controlled cycloconverter

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter

Patent

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Direct A.C. to A.C. converter controlled by a data processor

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter

Patent

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Direct AC converter for converting a balanced AC polyphase input

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter

Patent

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Direct AC/AC converter system

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter

Patent

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Drive system and AC conversion device

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter

Reexamination Certificate

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Drive system and AC conversion device

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c. – By semiconductor converter

Reexamination Certificate

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Dynamic frequency divider with a mixer stage and an amplifier

Electric power conversion systems – Frequency conversion without intermediate conversion to d.c.

Patent

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